[Feature request] When moving a window, allow merging tiles before snapping into place

[BasGeertsema]

When moving a window and holding the <CTRL> modifier key, make it possible to 'merge' tiles by holding a secondary key. The window will then snap into the outer bounds of these combined tiles. This behaviour is also possible in FancyZones for Windows.

[gadbot-rev2]

I was coming here to make the same suggestion. As a long time windows fancyzone user coming to Mint, I love that you've created this. However, the desire to splat a window across multiple zones is something that I really rely on over on the windows side.