Bunch of bugfixes, couple small features
Bunch of bugfixes, couple small features

- Added safeguards for adding/removing markers (only allow in
setupphase, print out client that tried circumventing).
- Getting colors with peek(), saves subscribing to it all the time.
- Fixed capturing progress bar not showing up sometimes (width was set
to lower as 0).
- Capture/neutralize progress now shows text to indicate current status.
- Capture/neutralize bar looks slightly nicer.

VincentSmit/cappening,VincentSmit/cappening