[Feature/Enhancement] Full-text search UX

[stexyz]

Enhancement / feature description: The full-text search dialog should keep the size and position last assigned.

It is rather small and the upper pane is unused, the "value" space is really small and to make it usable with many matches one needs to increase the size substantially. It is tedious to do when searching repeatedly (like when you don't exactly remember the phrase you search for etc.)

[Iznik285]

I think this links to #1294