Make IconPackHelper a member of IconPreviewHelper

Change-Id: Id98842f8102bc77802a424710931906395a2d3be
Allow filtering components when viewing a specific theme.

Change-Id: Ic3dbf42104549e80c1c0dce447c94b72868ea084
Merge "Make IconPackHelper a member of IconPreviewHelper" into cm-11.0
Merge "Allow filtering components when viewing a specific theme." into cm-11.0