Sometimes after modifying "Local File", closing Diff, I cannot modify the real file "because it is being diffed"
Repro:
1 BackupHistory on UpdateMacros.bat
2 On the left, pick "Local File".
3 Edit the "Local File": I edited two different lines.
4 Change the Left file to a version number.
5 Click a few different versions of the file.
6 Close BackupHistory.
Bug#1: It doesn't prompt to save the modified file.
Bug#2: The buffer is now read only:
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SlickEdit Pro
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Cannot modify C:\Users\jporkka\source\slick\UpdateMacros.bat because it is being diffed
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OK
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