#930 UI locks when trying to drag text in sql window

[Gunnar]

in the sql tab select a piece of text, and then drag it, you get a forbidden icon, but after this my whole xfce session blocks (no alt-tab, no selecting other windows, ....). killing squirrel remedies the problem. The cpu usage appears to be normal, memory usage too, nothing in the log files. Selecting another syntax editor in the session properties remedies the problem. So the problem resides in the RSyntax editor