VideoTools update

Added ui context menu on right-click of video image
Has option to "Mask" a particular video angle (camera source)
Left-click on video image now creates a 512-pixel by 512-pixel ROI (this can be changed later using Pars.Video) box that is a fixed-size, which can be used to crop the displayed region.
Once all ROI (or camera angle is disabled) have been set, right-click + Assign ROI will pop-up a dialog to confirm that you want to run trial extraction.
- This should only be done after all of the camera angles have been individually aligned! (Gross offset alignment, not necessarily on a per-trial basis).
- Clicking yes will start a (potentially long) process that individually exports trial videos for each camera angle, into the Videos folder of block (regardless of where the source video path is). Then it should update the .Paths.Videos of Block to reflect this change, and ultimately re-initialize the new blockObj.Videos field).
- (This last part, the re-init of blockObj.Videos, I have not yet addressed anything explicit for it although it can be done on ad hoc basis using blockObj.testbench etc. to run initVideos)

barbaLab / nigeLab