Exception when performing actions in (temporarily) offline Log Browser

[Tobias Knauss]

I opened the log messages browser on a file (using VisualSVN) and got the notification that the server was not available. So I clicked on "offline for now".

After that, despite being offline I double-clicked on a file in the log browser to show its changes. That caused the crash in the attached screenshot.

TortoiseSVN 1.9.7, Build 27920 - 64 Bit -dev, 2017/08/19 09:24:24