More controls to save images and video from cameras

[kdadzis]

Currently capturing of camera images is automatically started and cannot be changed later. The following features would be very useful without restarting multilog (for each camera separately):

• Adjustment of capture parameters, e.g. framerate, exposure time, infrared temperature range
• Buttons to Stop / Continue image storage
• Interrupt continuous storage of images and store a short video with predefined length and other settings

[kdadzis]

Automatic white balance does not work correctly in some cases. A multilog option to set some relevant parameters here is missing.