fix: regain focus after navigation arrows are used

[MayurSMahajan]

Solves:
#5491
#5548
#6211

The core issue is that the find InputField loses focus after match navigation keys are pressed.
Let me explain:
The find InputField has listens for Enter key press and navigates to the next found match.
Thus if the user were to find some text and keep pressing Enter then there will be no problem.

But
the main problem occurs when the user presses one of the navigating keys button, which causes the InputField to lose focus.

And when the input field loses focus, pressing Enter or Return causes the editor to delete the selection instead of navigating to the next match.

Thus this PR applies a workaround where the InputField gains focus even after navigating keys are pressed.

---

There is the third case where, the user deliberately makes a selection in the document and then pressing Enter should ideally modify the document.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.49%. Comparing base (b6bfd11) to head (58cfff2).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #878      +/-   ##
==========================================
+ Coverage   72.48%   72.49%   +0.01%     
==========================================
  Files         316      316              
  Lines       14757    14765       +8     
==========================================
+ Hits        10696    10704       +8     
  Misses       4061     4061              

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[MayurSMahajan]

Here's video after some testing:

2024-09-08.12-36-41.mp4