Enable opening page view HTML files on desktop

Also new notes icon, change button order on toolbar
Improve desktop file button action, especially with page view files
Unzip all files, not just HTML, for correct desktop display of images
Extract & overwrite all files when showing HTML pages on desktop
Draw smaller highlight circle on vector tips
Catch occasional exception thrown when loading DataTool tabs
Set predicted target x- and y-coordinates independently
Fix bug autotracking perspective filter corners
Display paths of trk/video files as tab tooltips
Enable protractor "Locked" menu item under all circumstances
Don't select autotracker track when selecting main view track
Put skip frame options at end of list (last resort)
Save trk in same folder as video by default (Save As...)
Update help to reflect changes in Documents button
Update version to 4.86
Merge branch 'db_develop' into forOSX