FIX(a11y): Improve accessiblity of the edit shortcut dialog

src/mumble/GlobalShortcutButtons.cpp

@@ -93,10 +93,12 @@ void GlobalShortcutButtons::toggleCapture(const bool enabled) {
 		GlobalShortcutEngine::engine->resetMap();
 		connect(GlobalShortcutEngine::engine, &GlobalShortcutEngine::buttonPressed, this,
 				&GlobalShortcutButtons::updateButtons);
+		m_ui->addButton->setText(QObject::tr("Listening for input"));
 	} else {
 		disconnect(GlobalShortcutEngine::engine, &GlobalShortcutEngine::buttonPressed, this,
 				   &GlobalShortcutButtons::updateButtons);
 		removeEventFilter(this);
+		m_ui->addButton->setText(QObject::tr("Add"));
 	}
 }
 

src/mumble/GlobalShortcutButtons.ui

@@ -45,6 +45,9 @@
           <property name="whatsThis">
            <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Starts the capture process: all buttons you press will be added to the tree.&lt;/p&gt;&lt;p&gt;Once all buttons are released, the capture process stops automatically.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
           </property>
+          <property name="accessibleDescription">
+           <string>Toggling this button will make the application listen for a shortcut. Once the shortcut is entered, the application stops listening for a shortcut. Multiple shortcuts can be assigned to the current action. Navigate to the shortcut list above to review the shortcuts currently assigned to the current action.</string>
+          </property>
           <property name="text">
            <string>Add</string>
           </property>
@@ -58,6 +61,9 @@
           <property name="toolTip">
            <string>Remove the currently selected items</string>
           </property>
+          <property name="accessibleDescription">
+           <string>This button will remove the selected shortcut for the current action. Note that you will have to select a shortcut from the list above first before this button has any effect.</string>
+          </property>
           <property name="text">
            <string>Remove</string>
           </property>