[DataEntry > ExistingDataTable] Change the semantic domain of a side-bar entry

From a Rapid Word Collection organizer:

It would be nice to be able to reassign domains to an entry collected, in the case where one accidentally records it in the wrong domain (too specific in a daughter domain, in a sibling domain, or in a parent domain or just a completely different domain). I imagine right-clicking on a word in the right upper area of the page that lists already collected entries and having a drop-down menu that says "reassign domain" and then when one clicks, it displays the tree with the domains, allowing one to click on a new domain, which would move the word to that domain. This also could be done in the "Edit entries" area, but I think it would be more helpful to move on the spot, without having to exit "Data Entry" mode.

Start at the DataEntry > ExistingDataTable area described in the issue and inspect how collected entries and domains are displayed. Define the reassignment interaction and domain-tree selection there; done means an existing entry can be moved from its current domain to a selected domain without leaving Data Entry mode.