1.4.10b1->b7 (1.5.0) browser integration + new file tracking

[nefycee]

- along with nefycee of course... -

that's me ... hi

[Maurizio]

Every once in a while, and it seems to be when Tabbles is drawing/displaying files, it will slow down to the point that it will take up to a second (or two in extremis) to display/draw the file in the file panel.

This looks like the bug that's giving me nightmares. Sometimes (I couldn't say when), when you open certain tabbles, Tabbles seems to slow down incredibily, i.e. starts doing one frame every four seconds or so. And it does not recover.

If I could just reproduce it regularly, I would be able to fix it. But until then, I can only guess that is a problem with threads. I will try to change the threading tecnhiques I am using.