Prevent access to invalid data while closing image display

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14702 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
BurstExample Script: Make it work with current api

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14703 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
MMAcquisition: Avoid possible null pointer exception

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14704 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
ASIdiSPIM plugin: Work-around problems in Micro-Manager api by no longer explicitly closing an acquisition

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14705 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd