tooltip: add tool tips to qt client

Change-Id: I7aeb96f4c8a09a8b8c0b8e6534079e3fa3965941
diff --git a/src/settingsview/components/PluginSettingsPage.qml b/src/settingsview/components/PluginSettingsPage.qml
index 636b810..293bfc4 100644
--- a/src/settingsview/components/PluginSettingsPage.qml
+++ b/src/settingsview/components/PluginSettingsPage.qml
@@ -74,6 +74,8 @@
                 backgroundColor: "white"
                 onExitColor: "white"
 
+                toolTipText: qsTr("Toggle to display side panel")
+                hoverEnabled: true
                 visible: mainViewWindow.sidePanelHidden
 
                 onClicked: {