Better Kiwix Server taskbar home button max-width

[kelson42]

Fixes #1084

I have increase the max-width of the Kiwix Server Home button to 30ch. Even if 30ch does not mean 30 characters, this is more or less the maximum width. It might happen that make it even a bit bigger in the future, but I didn't wanted to take too much risk to generate a regression of some kind.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 40.93%. Comparing base (7366938) to head (6ee0911).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1088 +/- ## ======================================= Coverage 40.93% 40.93% ======================================= Files 58 58 Lines 4204 4204 Branches 2307 2307 ======================================= Hits 1721 1721 Misses 1015 1015 Partials 1468 1468 ```

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