Created attachment 167509 [details]
White space showing after double clicking twice

SUMMARY
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I've recently started using Kdenlive but am having issues and bugs when running on multiple monitor displays. I would like to have the main program window (timeline and effects etc) on my center monitor and the actual video from the project (project window) displayed full screen on my 3rd (right hand side) monitor. 

Every time I launch Kdenlive I have to double click on the Project Monitor tab (always on the center monitor by default)  which makes the video go full screen on my 3rd monitor which is great. But I have to do this every time I launch the program. Is it possible to have it remember this layout every time so I can have main output fully maximised on 3rd monitor and don't have to double click the Project Window tab to get it to maximise every time?  

Also, one bug I get is after double clicking the Project Monitor tab, it correctly maximises the preview onto my 3rd monitor. But if I then double click on the 3rd monitor to make it to go back into the Project Monitor tab, it always shrinks the preview video down to a tiny box with a lot of white space around it (see attachments)
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STEPS TO REPRODUCE
1. Double click the Project Monitor tab to make the video fullscreen onto my 3rd monitor (which I've configured for full screen output in settings)
2. Video appears on 3rd monitor
3. Double click again on 3rd monitor to make it go back to the Project Monitor tab
4. Video appears in the tab with lots of white space around it (see after.jpg attachment)

OBSERVED RESULT
Video appears with lots of white space around it after double clicking on the full screen output (see after.jpg attachment).

EXPECTED RESULT
It should go back to how it was before in the Project Monitor tab (see before.jpg attachment) with no white space

SOFTWARE/OS VERSIONS
Windows: Win 10
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION