doc: show all availabled downloads and switch links to main mirror instead of GH

Author: georgik

src/Resources/download/index.html

@@ -145,7 +145,7 @@ <h1 class="text-center">ESP-IDF Windows Installer Download</h1>
         <h2 class="text-center">Open Source IoT Development Framework for ESP32</h2>
         <div id="section-download">
             <div class="download-button">
-                <form class="download-form" method="get" action="https://github.com/espressif/idf-installer/releases/download/online-2.15/esp-idf-tools-setup-online-2.15.exe">
+                <form class="download-form" method="get" action="https://dl.espressif.com/dl/idf-installer/esp-idf-tools-setup-online-2.15.exe">
                     <button class="button-online">
                         <i class="fa fa-download" aria-hidden="true"></i>
                         <div>Universal Online Installer 2.15</div>
@@ -155,7 +155,7 @@ <h2 class="text-center">Open Source IoT Development Framework for ESP32</h2>
                 </form>
             </div>
             <div class="download-button">
-                <form method="get" action="https://github.com/espressif/idf-installer/releases/download/espressif-ide-2.4.2/espressif-ide-setup-espressif-ide-2.4.2-with-esp-idf-4.4.exe">
+                <form method="get" action="https://dl.espressif.com/dl/idf-installer/espressif-ide-setup-espressif-ide-2.4.2-with-esp-idf-4.4.exe">
                     <button class="button-espressif-ide">
                         <i class="fa fa-download" aria-hidden="true"></i>
                         <div>Espressif-IDE 2.4.2 with ESP-IDF v4.4</div>
@@ -166,7 +166,7 @@ <h2 class="text-center">Open Source IoT Development Framework for ESP32</h2>
             </div>
 
             <div class="download-button">
-              <form method="get" action="https://github.com/espressif/idf-installer/releases/download/offline-4.4.1/esp-idf-tools-setup-offline-4.4.1.exe">
+              <form method="get" action="https://dl.espressif.com/dl/idf-installer/esp-idf-tools-setup-offline-4.4.1.exe">
                   <button class="button-offline">
                       <i class="fa fa-download" aria-hidden="true"></i>
                       <div>ESP-IDF v4.4.1 - Offline Installer</div>
@@ -177,7 +177,7 @@ <h2 class="text-center">Open Source IoT Development Framework for ESP32</h2>
             </div>
 
             <div class="download-button">
-              <form method="get" action="https://github.com/espressif/idf-installer/releases/download/offline-4.3.2/esp-idf-tools-setup-offline-4.3.2.exe">
+              <form method="get" action="https://dl.espressif.com/dl/idf-installer/esp-idf-tools-setup-offline-4.3.2.exe">
                   <button class="button-offline">
                       <i class="fa fa-download" aria-hidden="true"></i>
                       <div>ESP-IDF v4.3.2 - Offline Installer</div>
@@ -187,7 +187,7 @@ <h2 class="text-center">Open Source IoT Development Framework for ESP32</h2>
               </form>
             </div>
             <div class="download-button">
-              <form method="get" action="https://github.com/espressif/idf-installer/releases/download/offline-4.2.3/esp-idf-tools-setup-offline-4.2.3.exe">
+              <form method="get" action="https://dl.espressif.com/dl/idf-installer/esp-idf-tools-setup-offline-4.2.3.exe">
                   <button class="button-offline">
                       <i class="fa fa-download" aria-hidden="true"></i>
                       <div>ESP-IDF v4.2.3 - Offline Installer</div>
@@ -197,7 +197,7 @@ <h2 class="text-center">Open Source IoT Development Framework for ESP32</h2>
               </form>
             </div>
             <div class="download-button">
-              <form method="get" action="https://github.com/espressif/idf-installer/releases/download/offline-4.1.3/esp-idf-tools-setup-offline-4.1.3.exe">
+              <form method="get" action="https://dl.espressif.com/dl/idf-installer/esp-idf-tools-setup-offline-4.1.3.exe">
                   <button class="button-offline">
                       <i class="fa fa-download" aria-hidden="true"></i>
                       <div>ESP-IDF v4.1.3 - Offline Installer</div>
@@ -221,15 +221,15 @@ <h2 class="text-center">Want new installer features sooner?</h2>
         </div>
 
         <div>
-            <h2 class="text-center">Looking for a specific release?</h2>
-            <div id="info-show-releases" class="text-center">See of <span class="link" onclick="showReleases();">all available downloads</span>.</div>
+            <h2 class="text-center">Download links to available releases and mirrors.</h2>
+            <!-- <div id="info-show-releases" class="text-center">See of <span class="link" onclick="showReleases();">all available downloads</span>.</div> -->
         </div>
-        <div id="section-all-releases" class="section-hidden">
+        <div id="section-all-releases">
             <div class="list-row-headings">
                 <span class="release-number">Release version</span>
                 <span class="release-date">Release date</span>
                 <span class="release-download">&nbsp;</span>
-                <span class="release-notes">Click for more</span>
+                <span class="release-notes">Release notes</span>
             </div>
             <ol class="list-row-container menu">
                 <li>