[Ohrrpgce] SVN: teeemcee/11640 In Formation set editor, fix typing and deleting formation numbers.

[subversion at HamsterRepublic.com]

teeemcee
2020-03-20 20:14:16 -0700 (Fri, 20 Mar 2020)
213
In Formation set editor, fix typing and deleting formation numbers.

Delete now removes a formation.
Use zintgrabber. Previously, backspace on form 0 didn't remove it, and typing a
number on "Empty" didn't add it.
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U   wip/formationedit.bas