Make the settings window a little bit taller to accommodate most pages

According to the HIG, scrolling should be kept to a minimum on settings
dialogs. The default window size for the dialog is too small on desktop,
and usually needs to be resized to prevent scrolling.

src/qml/GlobalMenu.qml

@@ -31,7 +31,9 @@ Labs.MenuBar {
             onTriggered: pageStack.pushDialogLayer("qrc:/org/kde/neochat/qml/SettingsPage.qml", {
                 connection: root.connection
             }, {
-                title: i18n("Configure")
+                title: i18n("Configure"),
+                width: Kirigami.Units.gridUnit * 50,
+                height: Kirigami.Units.gridUnit * 42
             })
         }
         Labs.MenuItem {