[FIX] sap.m.UploadCollection: Theming Support (Bluecrystal & HCB)

Change-Id: I7b4535dbc781fbeaaf2c94948898eecb1c22b2a2

Split of CSS into base, bluecrystal, added: hcb

Change-Id: I7b4535dbc781fbeaaf2c94948898eecb1c22b2a2
Merge "[FIX] sap.m.UploadCollection: Theming Support (Bluecrystal & HCB)"