Made sharing form respect default policy settings, rather than always select "project sharing". Added confirmation message when a user selects "project sharing".
Made sharing form respect default policy settings, rather than always select "project sharing". Added confirmation message when a user selects "project sharing".

aina1205/nmtrypi-seek,SynthSys/seek,HITS-SDBV/seek,SynthSys/seek,aina1205/SysMO-DB-seek,Virtual-Liver-Network/seek,HITS-SDBV/nmtrypi-seek,SynthSys/seek,HITS-SDBV/nmtrypi-seek,HITS-SDBV/seek,HITS-SDBV/seek,Virtual-Liver-Network/seek,kjgarza/frame_experiment,Virtual-Liver-Network/seek,aina1205/SysMO-DB-seek,stuzart/seek,stuzart/seek,kjgarza/frame_experiment,BioVeL/seek,Virtual-Liver-Network/seek,kjgarza/frame_experiment,kjgarza/frame_experiment,HITS-SDBV/nmtrypi-seek,HITS-SDBV/nmtrypi-seek,aina1205/nmtrypi-seek,HITS-SDBV/seek,stuzart/seek,aina1205/SysMO-DB-seek,SynthSys/seek,aina1205/nmtrypi-seek,BioVeL/seek,aina1205/nmtrypi-seek,BioVeL/seek,BioVeL/seek