Add new icons to the window menu and a new action to select the windows
to be syncronized played
Add new class to define the dialog box to select sub windows from the list
Initial code is introduced and added to the main app for debug purposes
Structure of the dialog box created. Missing the functionality
Merge branch 'master' into dev_DialogWindowSelector
Merge branch 'master' into dev_DialogWindowSelector
Add the behaviour of the dialog: add and remove sub windows from a list
Incorporate the DialogSubWindowSelector into the main app
Merge master into dev_DialogWindowSelector
Merge branch 'master' into dev_DialogWindowSelector
Add function to select the initial window selection list