MacroScreenViewHandler.java improvement: get macro library locations from Visual Theme resources. Themes can create their own HTML now.

resourceTypeEnumId=VT_SCRN_MACRO_LIB - screen macro library location
resourceTypeEnumId=VT_FORM_MACRO_LIB - form macro library location
resourceTypeEnumId=VT_TREE_MACRO_LIB - tree macro library location
resourceTypeEnumId=VT_MENU_MACRO_LIB - menu macro library location


git-svn-id: https://svn.apache.org/repos/asf/ofbiz/branches/boostrap_theme@1635411 13f79535-47bb-0310-9956-ffa450edef68