Improve order by column flow

[mtrezza]

Issue

Currently, it is possible to order a collection by click on the column heading. Due to the dashboard layout, it can easily happen that while navigating the menu, one accidentally clicks on a column header, triggering a sort, for example while setting filters.

A collection sort without an index can have a sever impact on the DB. Therefore sorts should either
a) require more than a simple click on the column (e.g. sort only via context menu), or
b) show a warning dialog if the sort leads to a coll scan due to missing index (e.g. via index analysis)

[mtrezza]

Closing as duplicate of #1497.