Minor improvements to the logging UI (#4305)

* Minor improvements to the logging UI

* Fix URL

Author: daniel-beck

core/src/main/resources/hudson/logging/LogRecorderManager/all.jelly

@@ -31,6 +31,9 @@ THE SOFTWARE.
   <st:include page="sidepanel.jelly" />
   <l:main-panel>
     <h1><l:icon class="icon-clipboard icon-xlg"/>${%Jenkins Log}</h1>
+    <div class="alert alert-info">
+      Log messages at a level lower than INFO are never recorded in the Jenkins log. Use <a href=".">log recorders</a> to record these log messages.
+    </div>
     <t:logRecords logRecords="${h.logRecords}"/>
 
     <st:include page="feeds.jelly" />

core/src/main/resources/hudson/logging/LogRecorderManager/sidepanel.jelly

@@ -32,9 +32,10 @@ THE SOFTWARE.
     <l:tasks>
       <l:task href="${rootURL}/" icon="icon-up icon-md" title="${%Back to Dashboard}"/>
       <l:task href="${rootURL}/manage" icon="icon-gear2 icon-md" title="${%Manage Jenkins}"/>
-      <l:task href="." icon="icon-clipboard icon-md" title="${%Logger List}"/>
-      <l:task href="all" icon="icon-notepad icon-md" title="${%All Logs}"/>
-      <l:task href="new" icon="icon-new-package icon-md" title="${%New Log Recorder}"/>
+      <l:task href="." icon="icon-clipboard icon-md" title="${%Log Recorders}">
+        <l:task href="new" icon="icon-new-package icon-md" title="${%New Log Recorder}"/>
+      </l:task>
+      <l:task href="all" icon="icon-notepad icon-md" title="${%All Log Messages}"/>
       <l:task href="levels" icon="icon-gear icon-md" title="${%Log Levels}"/>
     </l:tasks>
   </l:side-panel>

core/src/main/resources/hudson/logging/Messages.properties

@@ -21,4 +21,4 @@
 # THE SOFTWARE.
 
 LogRecorderManager.init=Initialing log recorders
-LogRecorderManager.DisplayName=log
+LogRecorderManager.DisplayName=System Log