avoid querying clipboard while modal active

[kevinushey]

This should fix #1587.

[krlmlr]

If you could make a .deb available, I can give it a try. The most recent nightly doesn't fix the problem yet (of course).

As a side note, the clipboard override that happens in the affected routine looks dubious to me. I did notice the "\x01" characters appearing in the clipboard under some circumstances, but maybe there's a way to fix this problem at the root? The problem didn't affect me that much because I'm using a clipboard ring -- if we can't fix at the root and need to work around, maybe the RStudio IDE could implement a clipboard ring internally and filter the "\x01" when pasting (and also when the main window loses focus)?

[lepennec]

I can confirm it solves the issue with Fedora 26. Thanks!

[krlmlr]

Thanks! Solves the problem for me in Ubuntu GNOME.

[cranedroesch]

Glad you guys have fixed the problem, but would appreciate if you could let me (and my fellow muggles) know how to access your fix. It's not a problem solved by apt-get update && apt-get upgrade yet.

[rmflight]

@cranedroesch probably by installing a daily build from https://dailies.rstudio.com/