Recall plugin: fixed Netbeans warnings

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14813 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
PatternOverlay plugin: Removed Netbeans warnings

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14814 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
MultiChannelShading plugin: fix Netbeans warnings

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@14815 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd