create a simple cache for storing model hierarchy lookups
create simple methods in a base class for model hierarchy navigation
create a wrapper for hierarchy navigation using different types
adjust PojosImpl to use hierarchy navigator

this will make changes for ticket 11019 easy to implement
change preprocessor to use hierarchy navigator
adjust do-all for change in preprocessor constructor
update preprocessor test class with latest changes
remove weird rebase artifact
replace local function with third-party library function
Remove data when removing user/group.
Fix tooltip in remove user action.
Clean up display when the user is removed.
Sort images by timestamp in center. See #11986
Sort users & fix placeholder text in Edit Group. See #11985
Update Edit/group placeholder messages for PR2105
Owner warned on removing last user. See #11984
Fix Double-click on well after paste rdef. See #11987
Pass Image IDs to script when Wells selected. See #11835
Added icon for inplace imports to metadata agent's IconManager
Added inplace import icon to metadata view