Modified Qube Manager toolbar to be more readable and added Emergency Pause

Instead of tiny buttons, now Qube Manager will have bigger buttons and text underneath.
Furthermore, Pause gets renamed to Emergency pause for clearer communication.

references QubesOS/qubes-issues#5993

ui/qubemanager.ui

@@ -326,6 +326,9 @@ Template</string>
    <property name="allowedAreas">
     <set>Qt::BottomToolBarArea|Qt::TopToolBarArea</set>
    </property>
+   <property name="toolButtonStyle">
+    <enum>Qt::ToolButtonTextUnderIcon</enum>
+   </property>
    <property name="floatable">
     <bool>false</bool>
    </property>
@@ -361,7 +364,7 @@ Template</string>
      <normaloff>:/createvm.png</normaloff>:/createvm.png</iconset>
    </property>
    <property name="text">
-    <string>Create &amp;new qube</string>
+    <string>&amp;New qube</string>
    </property>
    <property name="toolTip">
     <string>Create a new qube</string>
@@ -391,7 +394,7 @@ Template</string>
      <normaloff>:/resumevm.png</normaloff>:/resumevm.png</iconset>
    </property>
    <property name="text">
-    <string>Start/Resu&amp;me qube</string>
+    <string>Start/Resu&amp;me</string>
    </property>
    <property name="toolTip">
     <string>Start/Resume selected qube</string>
@@ -406,7 +409,7 @@ Template</string>
      <normaloff>:/pausevm.png</normaloff>:/pausevm.png</iconset>
    </property>
    <property name="text">
-    <string>&amp;Pause qube</string>
+    <string>Emergency &amp;pause</string>
    </property>
    <property name="toolTip">
     <string>&lt;p&gt;Pause selected qube&lt;/p&gt;&lt;p&gt;Stops all CPU activity in the selected VM until the VM is unpaused. This action does not change how much memory is allocated to the VM. (EXPERIMENTAL)&lt;/p&gt;</string>
@@ -421,7 +424,7 @@ Template</string>
      <normaloff>:/shutdownvm.png</normaloff>:/shutdownvm.png</iconset>
    </property>
    <property name="text">
-    <string>&amp;Shutdown qube</string>
+    <string>&amp;Shutdown</string>
    </property>
    <property name="toolTip">
     <string>Shutdown selected qube</string>
@@ -436,7 +439,7 @@ Template</string>
      <normaloff>:/restartvm.png</normaloff>:/restartvm.png</iconset>
    </property>
    <property name="text">
-    <string>Restar&amp;t qube</string>
+    <string>Restar&amp;t </string>
    </property>
    <property name="toolTip">
     <string>Restart selected qube</string>
@@ -451,7 +454,7 @@ Template</string>
      <normaloff>:/apps.png</normaloff>:/apps.png</iconset>
    </property>
    <property name="text">
-    <string>Add/remove app s&amp;hortcuts</string>
+    <string>App s&amp;hortcuts</string>
    </property>
    <property name="toolTip">
     <string>Add/remove app shortcuts for this qube</string>
@@ -466,7 +469,7 @@ Template</string>
      <normaloff>:/updateable.png</normaloff>:/updateable.png</iconset>
    </property>
    <property name="text">
-    <string>&amp;Update qube</string>
+    <string>&amp;Update</string>
    </property>
    <property name="toolTip">
     <string>Update qube system</string>
@@ -478,7 +481,7 @@ Template</string>
      <normaloff>:/firewall.png</normaloff>:/firewall.png</iconset>
    </property>
    <property name="text">
-    <string>Edit qube &amp;firewall rules</string>
+    <string>Edit &amp;firewall</string>
    </property>
    <property name="toolTip">
     <string>Edit qube firewall rules</string>
@@ -537,7 +540,7 @@ Template</string>
      <normaloff>:/settings.png</normaloff>:/settings.png</iconset>
    </property>
    <property name="text">
-    <string>Qube s&amp;ettings</string>
+    <string>S&amp;ettings</string>
    </property>
    <property name="toolTip">
     <string>Qube Settings</string>
@@ -549,7 +552,7 @@ Template</string>
      <normaloff>:/restore.png</normaloff>:/restore.png</iconset>
    </property>
    <property name="text">
-    <string>&amp;Restore qubes from backup</string>
+    <string>&amp;Restore</string>
    </property>
    <property name="toolTip">
     <string>Restore qubes from backup</string>
@@ -561,7 +564,7 @@ Template</string>
      <normaloff>:/backup.png</normaloff>:/backup.png</iconset>
    </property>
    <property name="text">
-    <string>&amp;Backup qubes</string>
+    <string>&amp;Backup</string>
    </property>
    <property name="toolTip">
     <string>Backup qubes</string>
@@ -605,7 +608,7 @@ Template</string>
      <normaloff>:/killvm.png</normaloff>:/killvm.png</iconset>
    </property>
    <property name="text">
-    <string>&amp;Kill qube</string>
+    <string>&amp;Kill</string>
    </property>
    <property name="toolTip">
     <string>Kill selected qube</string>
@@ -617,7 +620,7 @@ Template</string>
      <normaloff>:/kbd-layout.png</normaloff>:/kbd-layout.png</iconset>
    </property>
    <property name="text">
-    <string>Set keyboard la&amp;yout</string>
+    <string>Keyboard la&amp;yout</string>
    </property>
    <property name="toolTip">
     <string>Set keyboard layout per qube</string>