feature request: info about currently targeted OF install

[artificiel]

when using PG while juggling different OF trees it sometimes gets confusing to know which OF is actually being target.

proposal to add a "status line" indicating the current OF selection on the main window:

[danoli3]

Agreed its easy to mess this up as even if you run projectGenerator, a different one from a different checkout it may go to the last used path.

Also this maybe a bug maybe not taking into account in the config/save file where the context for this current projectGenerator is being used from.

C:/openFrameworksOriginal/projectGenerator.app - > used first
C:/openFrameworksSideQuestCheckout/projectGenerator.app -> used second will automatically be set to "C:/openFrameworksOriginal/" as the known checkout.

Transparency of this path thus, a good idea first and second lets fix that config save bug