refs #1036 Fixed NPE and wavedev file issue when implementations have
identical IDs
refs #1272 Added null check to prevent NPE when generating node with
strange SDR location
refs #1259 Clean up if component gets deleted from chalkboard before it
finishes launching, put in some null analysis
Add problem filter for addition of version constraint. Update API tags for 1.9.1
Adding JDT classpath for Tycho
Correcting null annotations for Checkstyle
added null check for local waveform terminate.  fixed spelling error
refs #1244 Deleted line removing listener from PropertyFile when PRF
page is removed
refs #1373 Ensure the command to edit the diagram is done on the UI thread.
refs #1186 clarified SAD duplicate external properties error messages, changed icon for expand-all in SAD properties tab
Merge remote branch 'origin/develop-1_8' into develop-1.9

* origin/develop-1_8:
  refs #1036 Fixed NPE and wavedev file issue when implementations have identical IDs
Remove error on connect since it could be to a plot. Added trace option instead.
refs #1424 fix connect port regression introduced on Nov 1
remove unncessary api baseline filter for org.eclipse.emf.ecore.xmi v1.0.0
refs #1424 minor checkstyle fixes in ModelMap
refs #1429 Handle changes of Struct sequence wizard and added reset
button.
refs #1429 updated to correctly call refresh on the SadPropertiesPage
refs #1418 Add null check.
refs #1298 Added some null analysis checks.
refs #1450 Added method to Component Editor that the GeneralInfoSection class can call to set the PRF file when a user adds it via the overview tab