enhancement: Add F2 key to rename maps.

[lyimu]

This might just be a personal preference type of thing but I always use F2 over right-clicking or double-clicking.
Many programs allow F2 for this function like Blender, Godot, Windows File Explorer and countless more. Would be awesome to see it in this engine too.

[Sh4d0v]

frmMapList.Designer.cs.zip

replace in \Source Code\Intersect-Engine\Intersect.Editor\Forms\DockingElements and compile