Digital TV: new Digital TV options, split from analog capture options

1. General
- Split menu entry into: Open Digital TV / Open Analog Capture. File->Open Device now only refers to analog device
- Navigation panel: only enabled tabs visible (depending on Digital TV options). Set initial active tab depending
on current channel type.

2. Exception handling:
- error controls (checking devices, etc.) moved from the general entry point to each channel
switch operation
- Change current behavior: when error switching to channel -> show error message in info bar and ready for switch to another channel

3. Options & preferences:
- Split from analog capture
- New Digital TV options: DVB (BDA) and IPTV (include option: enable/disable IGMP multicast membership management)