New text manipulation shortcuts

[leecbaker]

There are a few additional keyboard shortcuts for text editing that could be implemented for DRT.

also expected, to be able to type HOME or END key, with mouse cursor already inside the search field, then go straight to beginning or to the end of the words already in the field
in complement to be able to use the shortcuts like MAJ + HOME / MAJ + END / MAJ + LEFT/RIGHT ARROW / MAJ + CTRL + LEFT/RIGHT ARROW to select char/word/whole sentence in the search field or in selected dataref

https://forums.x-plane.org/index.php?/forums/topic/82960-datareftool-is-an-improved-datarefeditor-open-source-better-search-change-detection/&do=findComment&comment=1913935