Circles drawn filled by default again

... and also fixed a crash when the source reaches EOF
Board images from Fritzing for SerialTab eyecandy
M: Misc small cleanup

Renamed ROI/OOI classes to RegionOfInterest/ObjectOfInterest to make
code more explicit; Radius is now a property of a shape; Made debug
message in sidebar more accurate (i.e. the thing doesn't actually do
what I stated before...); Removed more debug prints
Color label for ROI page with color picker

Color of ROIs and associated shapes can now be changed at any time.
Changes should be saved to template.
Absolute coordinate tag, color w/o alpha

Storing templates more accurately. Aka can load them again.
M: Messed with transmission label

But changed it back.