Somehow I enabled a selection mode in pycharm (community edition running on Ubuntu 17-10) that I can't disable. After some reading I suspect it's the "sticky selection mode", but toggling it doesn't make a difference. Here's what happens:
I single click on any location on the editor and release the button, then move the mouse, everything between the first click location and the current mouse position gets selected. To be clear, I don't keep the button pressed, a single click starts the selection.
I'd appreciate your help to first correctly identify which selection mode is this and then disable it. Thank you in advance!