[Linux bug report + possible fix] Small capture window on Linux

[GaliosUA]

I've encountered a problem with the capture window on Manjaro Linux. After using the shortcut there was only a small capture box in the upper left corner of the screen, around 300x300 in size.
I was able to fix this by editing BaseOCRView class in base.py inside the ocr folder and adding self.setMinimumSize(QSize(1920,1080)) to it, to directly match my screen resolution. Works as a personal crude fix, but there should be a better way to handle this.
Thanks for the project, aside from some small problems it works perfectly.