EffectComposer: Allow 'define' properties to specify control type

Control type is used to determine the control presented for the property
in UI. Currently only int and bool control types are supported.

Also fixed the issue that changing define wouldn't update preview.
This was because changing define requires rebaking shaders, which is
not normally triggered on property change.

Fixes: QDS-11770
Change-Id: I953d827195565f765df1a09550c4a49da9c93c29
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>

src/plugins/effectcomposer/compositionnode.h

@@ -56,6 +56,7 @@ signals:
     void uniformsModelChanged();
     void isEnabledChanged();
     void isDepencyChanged();
+    void rebakeRequested();
 
 private:
     void parse(const QString &effectName, const QString &qenPath, const QJsonObject &json);