Non correct filtered headwords number

[GD-fix]

Describe the bug
Initially (i.e. with empty filter) in Dictionary headwords window there is non correct number (0) of filtered those (see the first and the second screenshots).
After applying the non empty and then the empty again filter the number changes: for some dictionaries it is non correct (i.e. non equal to the Unique headwords total number) still (see the third screenshot: may be it's because of ignored due to the long size headwords?) and for other dictionaries it becomes correct (see the forth screenshot).

To Reproduce
Steps to reproduce the behavior:

1. Go to 'Dictionaries panel'
2. Click right on a dictionary
3. Scroll down to the end of headwords list
4. See error
5. Print and then delete some letters in filter string
6. Scroll down to the end of headwords list
7. Compare

Expected behavior
The equal numbers of Unique headwords total and filtered in case of empty filter.

Screenshots

OS and software versions

• OS: OpenSUSE Tumbleweed
• Version up to date

[GD-fix]

P. S. ArchWiki doesn't have skipped during indexing headwords...

[GD-fix]

In current pre-release all the same...

And additional question: the fact that in ZIM dictionaries after applying the non empty and then the empty again filter the numbers of Unique headwords total and filtered aren't still equal is due to this (in case when abbreviated headwords are the same)?

[GD-fix]

And what is the problem to correct the code, that it will be initially (on headwords window opening) the same as after filter applying?

[GD-fix]

The problem was solved.