Selecting "No" when running as admin produces error state

[ismyrnow]

Required information!
OS version: Win8.1 x64
ConEmu version: 140814 [64]

Bug description
If you try to start a console as Admin, then accidentally select "No", conemu gets into a strange state.

Steps to reproduction

1. Open conEmu
2. Right-click the tab and select "Restart as admin"
3. Select "No" in the Windows prompt.
4. A conemu error message shows up. Select "No" to keep console open.
5. Right-click the tab and select "Restart as admin" again.
6. Another conemu error message shows, allowing you to report a bug. See screenshot:

My expectation would be that selecting "No" in the Windows prompt would either close the tab automatically, or put me back in to the previous state (un-elevated prompt) and allow me to try restarting as admin again.

This is a super minor bug, since you shouldn't select "No" in the Windows prompt anyways. However, conemu opened my browser and got the issue started for me, so I figured I would submit it with details.

[Maximus5]

http://conemu.github.io/en/BadIssue.html
http://conemu.github.io/en/OldBuild.html

[ismyrnow]

Issue still present in build 150420 [64].

[Maximus5]

160207?

[ismyrnow]

I'm no longer using a Windows environment, so I can't test if the issue has been resolved. Feel free to close this if you want, and thanks for the great piece of software.