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Merged revision(s) 3001-3044 from tags/version-4.5.1:

This comprises all changes made from release 4.5.0 to release 4.5.1.

Moved RefreshActions method from TBaseForm into TControlHelper.

This was done because the same functionality is also needed in frames.

Moved TControlHelper from FmBase unit to UClassHelpers.

Renamed UImageListHelper unit as UClassHelpers.
Changed ULEDImageList to refer to renamed UClassHelpers unit.