Problem

Currently it is not possible to search multiple TMs at the same time and batch-delete segments from them. This is time-consuming for users.

Solution

Enable multi-select of TMs

like outlined in the screen shot (and along-side this add an ID-column in the window to filter by ID).

Also add a button, that selects all TMs in the current filtering.

Backend handling

For performance reasons it is important, that the back-end searches multiple TMs at the same time. How many should be configurable with a level 1 config (not available in UI).

If more TMs should be searched, than the config allows at the same time, the next TM should be searched, when for one there are no additional results.

Same is true for counting the segments in the TM(s).

Mass deletion

It should also work for the found results of the multi-search of TMs.

It should trigger mass deletion also at the same time for multiple TMs and respect also a second config param that defines, how many TMs are handled in mass deletion at the same time. If there are more TMs to be handled then configured to be done in parallel, the next should be handled as soon as one is done.