In Bug #778850 (marked as a duplicate of this bug), Andrew had a good suggestion that appears to work great:
"Work-around: resize using the top left and right corners or ALT+F8 and use the keyboard." -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/749986 Title: Resizing LO window from bottom right brings up pop-up and undesirable effects -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
