REL-2090: Added code to make migration from old way of representing parallactic angle mode to new way to preserve in update.
REL-2090: Found a bug in the ObsQueryFunctor relating to parallactic angle.
REL-2090: Removed PositionAngleMode, which has been superceded by adding PARALLACTIC_ANGLE to PosAngleConstraint. Additionally, found and fixed a few bugs.
REL-2090: Code cleanup and removal of no longer relevant (and confusing) comment.
Merge pull request #89 from sraaphorst/feature/REL-2090

REL-2090
REL-2111: fix disappearing panel issue
Merge pull request #91 from swalker2m/feature/REL-2111

REL-2111: fix disappearing panel issue
OCSADV-191: pass an obs context to the magnitude table lookup instead of creating the magnitude table with an obs context
OCSADV-191: thread the MagnitudeTable through all the code that ultimately needs it
OCSADV-191: add parsing of probe limits from a file, loading magnitude table at startup
OCSADV-191: switch to the config file based mag table
OCSADV-191: separated the GeMS-specific behavior in DefaultMagnitudeTable to GemMagnitudeTable, deleted DefaultMagnitudeTable, delegated to GemsMagnitudeTable where necessary.
OCSADV-191: minor cleanup