Folder comparison status not accurately reflected in toolbar

[TBugReporter]

Version: Windows 2.16.40.0

Steps to reproduce:

• duplicate a folder on your PC containing several files to create a test scenario.
• delete two files from one of the folders, and use WinMerge to compare them.
• click the green down arrow button to move to the first difference.
• click the blue left or right arrow to copy the missing file.
• click the green down arrow button again.

Expected result:

• Both green arrows get grayed out, since the focus is now on the only difference, and there is no next or previous difference to move to.

Actual result:

• "Previous difference" lights up.

[sdottaka]

This issue has been fixed in commit acd563f. Thank you for your report.