Using an abstract property was awkward for this as it is being consumed
in the underlying constructor but could not be dynamically set in time from a
derived class.
DI is also not needed anymore to access StableInfo, this goes through FileBasedIPC.
Note: directory selector now always navigates to the osu! lazer base path.
- button text change
- renamed ActionableInfoWithNumberBox to ResolutionSelector and moved the clamping logic inside it
- also removed the ugly right margin and added the FillFlowContainer