Show error messages in front of the MMStudio window rather than in the middle of the screen.  This is mainly helpful for dual monitor systems.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14113 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
Fix annoying error message when using the scroll wheel while mouse moves stage is on and no Core-Z-Drive is set.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14114 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
Place error messages on top of the plugin window rather than the center of the screen.  Helpful with dual monitor setup

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14115 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd