No standard Find (not Filter) functionality (accessible via Cmd-F)

Find and Filter of table content (and of query results) are two distinct functionalities. Usually, Cmd-F maps to the former. Cmd-Option-F maps to the latter in Postico 1 and in Postico 2 Cmd-F maps to Filter. However the actual Filter functionality on tables seems absent in both versions – it's greyed out. (See also #400.)

@jakob's comment in #204 (and #279) makes me believe there's a reason why there is no standard Find functionality, but I can't think of anything. What's the reason? I often want to find entries in big tables and view them in context. This is something that Filter does not provide since it filters out the surrounding non-matching rows.

Providing proper Filter functionality would also take care of #647.

Mapping Cmd-F to Filter in Postico 2 seems to give up on the intention expressed in @jakob's comment in #204, which seems like a shame.

Start by reviewing the linked context in #204, #279, #400, and #647, then compare the current Cmd-F and Filter behavior described for Postico 1 and 2. Done would require a decided approach that restores a distinct standard Find experience while addressing the related filtering concerns.

Written by the indexing model from the issue text.