HButton binding source path properties in root node on template qml file can't be replaced properly

If there are binding source path properties in root node on HButton template qml file,  source path properties' replacement isn't done in a way we want during component merging. it is  just only  property name and value(path) with no "property string"  keyword. so then, merged qml file causes a warning message of invalid on QDS. 

 

• - before merging –

import ccOS.GUI.Controls 2.0

T.Button {
id: control
objectName: "HButton"
property string backgroundSrc: relativeBGPath

 

background: HNinePatchImage

{            id: innerBackground }

}

 

– after merging –

import ccOS.GUI.Controls 2.0

T.Button {
id: control
objectName: "HButton"
backgroundSrc: "assets/bco_btn_bg_bottom"

 

background: HNinePatchImage

{            id: innerBackground }

}