[Port main] #3624 - Fix Multi-Row Drag-and-Drop Issue for Chips in Item Submission Form

[dspace-bot]

Port of #3654 by @Simone-Ramundi to main.

[nwoodward]

@tdonohue @Simone-Ramundi Before this gets ported to main I want to ask about this comment in the PR for dspace-8_x.

This issue arises because the current version (17.3.10) of Angular Material’s cdkDropList does not natively support multi-row. Support of multiple row has been added to Angular 18.
So for DSpace 9 the fix can be done when upgrading to Angular 18. While in DSpace 8, which uses an earlier Angular version, we need a custom fix.

Does that mean the PR does not need to be ported to main because it will be fixed automatically by upgrading to Angular 18 (#3717)?

[tdonohue]

Good question, @nwoodward . I don't know the answer myself, but I'll refrain from merging this into main until we are certain it needs to be merged there.

@Simone-Ramundi , let us know if this should be merged into main or not. It may be that this automatic port PR can simply be closed if we don't need it on main.