kcms/rules: Increase the default dialog size

This KCM is usually called via the application menu, which uses
kcmshell, so it doesn't benefit from the SystemSettings minimum size.

Slightly increse its height, so there is more space for properties
in the list views, either to configure them or to add them, so it
feels less cramped.

src/kcms/rules/ui/main.qml

@@ -16,7 +16,7 @@ KCM.ScrollViewKCM {
 
     // FIXME: ScrollViewKCM.qml:73:13: QML Control: Binding loop detected for property "implicitHeight"
     implicitWidth: Kirigami.Units.gridUnit * 35
-    implicitHeight: Kirigami.Units.gridUnit * 25
+    implicitHeight: Kirigami.Units.gridUnit * 35
 
     KCM.ConfigModule.columnWidth: Kirigami.Units.gridUnit * 23
     KCM.ConfigModule.buttons: KCM.ConfigModule.Help | KCM.ConfigModule.Apply