Development marc

- Fixes:
  - #181: progress of download also shown after reentering the detailStoreViewController
  - #172: When scrolling in RecentProgramStoreViewController the loading View is disabled
  - #174: Activity indicator in statusBar for HelpViewController
  - #178: Starting background color is blue
  - #179: LoadingView in HelpViewController only at the first load
  - #180: added progressView to HelpViewController
  - #173: Activity indicator in statusBar for DownloadTabBarController
  - also added Activity indicator in statusBar for downloading with fileManager
  - removed warnings we discussed at the meeting

- some -small- improvements to the searchBar issue