Added the Window Name entity to support Tcl/Tk language.

[oliverbacsi]

Hello @anomaly256 , the atom package "language-tcltk" has been updated recently with my contribution to support Tk commands and window paths as well. Although the window paths won't be highlighted by any separate color as long as there is no Window entity in the syntax file. So I added some rows to Your base.less file to have this Window entity created to be able to highlight according to the Tcl/Tk syntax.

[anomaly256]

Thanks, I'll check this out shortly