This makes the pcbnew multiline text editor natively accept tabs in the
same manner as eeschema and extracts key handling routines to the shim
to allow undo/redo.
Also allows Ctrl-Y under Linux in addition to other platforms. While
not as popular as Ctrl-Shift-Z, it is utilized for Redo in some contexts
While we're re-using the Text Properties dialog, it really covers all
properties for a Dimension, so it needs to be more clear what's text
and what's not. This changelist uses the Tooltips to store the more
explicit labels so they can still be edited in FormBuilder.
jean-pierre charras
Seth Hillbrand
Jeff Young
John Beard