Added main panel widgets
Added icons for writing and photos
Added main panel css definitions
Added pisak logo widget
Added pngs for main panel buttons
Added pisak logo transparent picture
refs #710 #711 #689
Merge branch 'master' into main-looks
Merge branch 'master' into main-looks
Connected main panel in viewer app
refs #711
Return to main panel from photo edition
refs #711
Background image in main panel
refs #711
Merge branch 'master' into main-looks