Open MCT v1.7.4

Improvements
[Plots] Show plot limit lines for telemetry #3914 #3884
[Tabbed Layouts] Reimplement New Tab action in vanilla JS #3834
[Notebooks] Multi-user notebooks - v1 #3784
[Notebook] Copy label and value from alphanumeric in Layout directly to a Notebook entry #3299
[Time Conductor] Improved Time Conductor inputs #3311

Bug Fixes
Navigating sporadically throws Couch errors #3964
[Styles] no js-style-receiver class in object view results in console error #3949
Tree doesn't update after renaming during Duplicate action #3944
Plan View/Timestrip not responding to Time Conductor bounds changes #3943
Move action dialog is correct for one object type #3940
Disallow panning and zooming plots in time strip view #3847

Testing
Fix dangling promises in unit tests #3828

Documentation
[README] Add link to discussions show and tell in README.md #3932