#206 Linux middle click support

[James Calfee]

In most linux system, at the end of a text selection process (for example, click and drag over text), the selected it is automatically copied into an alternet clipboard. To confirm, a middle click of the mouse button should paste the contents last copied to the alternet clipboard.

This typically works automatically in basically all programs and should not require custom programming. I'm not sure why, but only alternate clipboard pasting works Flamerobin. If there is any easy way to use the standard build-in support for this it would be very helpful.