WIP - endpoint for transfering a component
move the children of anything transferred
WIP component transfer in the frontend

WIP Frontend mechanism to transfer components from a resource to another

Fix selenium tests as the extra linker in the transfer popup conflicted with the subject linker selector
adjust the frontend controller and add additional tests
Clean up frontend form for transfering compontents; Update backend to retain the parent_id for the children but force the topmost to become a root record of the new resource;
Reword transfer conflict error message - no detail just generic wording
Simplify conflict error message wording
Merge pull request #374 from hudmol/component-transfers-cleanup

[Delivers #45552845] Component Transfers