[feature] Grid settings panel (presets)

[motorsep]

I started making a map in Blender (more or less a proper map) and quickly found out that it's a chore to adjust grid settings while modeling. Would it be possible to make something like a floating icon that opens up a panel (or maybe right-click menu instead of icon) with predefined grid settings (1,2,4,8,16,32,64,128,256,512,1024,2048, 4096, etc.) and grid subdiv settings ?