Sticky search?

[sphh]

When you switch from one folder to another, the search expression is cleared. Another extension (TotalQuickFilter) features a Sticky button, which keeps and activates the search expression, when changing folders.

Since Expression Search - NG works without (additional) buttons, I could imagine that capitalized keywords could keep the search active, e.g. F:foo t:bar becomes F:foo after switching to a different folder (Note, the capitalized F: is kept, whereas t: is deleted), but there might be a better approach!

Would it be possible to implement such a feature?

[opto]

I had been thinking about something like this for some time, this might be a good option to realise it.