[Ohrrpgce] SVN: teeemcee/12937 Improve formation set editor by adding formationgrabber

[subversion at HamsterRepublic.com]

teeemcee
2022-04-25 22:00:27 -0700 (Mon, 25 Apr 2022)
294
Improve formation set editor by adding formationgrabber

You can now use Ctrl-Enter/Click to edit a formation and Insert/+ to add
new. (You could already do those from the formation browser.

Also fixes the menu not updating after entering thingbrowser.

Also cleans up some ugly offset munging
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U   wip/customsubs.bi
U   wip/customsubs.rbas
U   wip/formationedit.bas
U   wip/ohrhelp/formation_sets.txt