Allow VM window to be resized smaller than its configured resolution

[Gavinkaa]

Allow the VM window to be resized below its configured display resolution by removing the minWidth/minHeight constraints in Run.swift. This lets users on smaller host screens shrink the window for better multitasking.

See issue #1087

[edigaryev]

I've tried this change locally and I'm afraid that this is not a good UX as it's almost impossible to get back to the original dimensions after one fiddles with the Tart window size.

Whereas without this change, you can just resize the window to it's smallest dimensions to get the default size.

This lets users on smaller host screens shrink the window for better multitasking.

I think this can be achieved by modifying your VM as follows:

tart set --display 1x1 <VM name>

[Gavinkaa]

Thanks for checking! Your solution seems to work well, so let's stick with it and avoid any code changes.