Add a popup window with a hint

Author: MinyazevR

plugins/robots/common/twoDModel/src/engine/view/twoDModelWidget.ui

@@ -13,6 +13,9 @@
   <property name="windowTitle">
    <string>2D Robot Model</string>
   </property>
+  <property name="toolTip">
+   <string>Switch to the region editing mode</string>
+  </property>
   <layout class="QGridLayout" name="gridLayout" rowstretch="0,0,0,0,0,0,0" columnstretch="0,0,0,0,0">
    <item row="0" column="1" rowspan="7">
     <widget class="QWidget" name="toolbarWidget" native="true">
@@ -152,6 +155,9 @@
       </item>
       <item row="3" column="0">
        <widget class="QPushButton" name="initialStateButton">
+        <property name="toolTip">
+         <string>Reset the world configuration to the start</string>
+        </property>
         <property name="text">
          <string/>
         </property>