Open MCT v2.1.1

Improvement
Synchronization for new tags on notebook entries #5734

Bug fixes
[Notebook] Dropped item embeds not displaying properly #4967
[Sine Wave Generator] Clicking on the plot causes duplicate plot points to appear #5395
Grid icons are wrong #5303
[Toolbar] Error occurs under some circumstances after editing display layouts and flexible layouts
"units" displayed instead of "unit" in the plot top legend and legend form #5540
Race condition can cause notebook entry tag updates to be lost #5558
Misc UI problems #5640
[Notebook] Many network calls generated when a single entry is added #5641
In time conductor history, show them on hover if only milliseconds have changed #4386
An error while saving can leave Open MCT in an unrecoverable state #5802
Search is case-sensitive when searching for YAMCS telemetry #5822
Deleting a notebook entry without tags throws an error and the modal does not close #5823
[Plots] Plot series not updated when removing a series #5824
[Elements Pool] Aliased items are not shown to be aliased #5833
[Tabs View] Making requests when switching tabs while eager load is true #4206
[Plots] Should not make requests every time a user clicks on the plot #3033
Example Imagery dropped into LAD Table throws errors #2945

Maintenance
Proposal: Require reviewer to smoke test before merge #5770
Replace app.js with webpack-dev-server #5031
[ci] Move off app.js refactor #4922