3117: Fix search term half-stays on language change

[lunars97]

Short Description

Currently search term stays in input after language change but the url query gets cleared out.

Proposed Changes

• change defaultValue to value in TextInput because defaultValue contains the default value, while value contains the current value after some changes have been made.
• use UseEffect to update filterText

Side Effects

• none

Testing

• Go to the search page
• Search for Augsburg
• Change the language
• See that url query and search input text disappear

Resolved Issues

Fixes: #3117

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[LeandraH]

Very nice, thank you! Tested in Firefox

[f1sh1918]

Looks good 👍
Nicely done!

[steffenkleinle]

Just requesting changes to avoid merging to discuss this. I am not 100% sure but shouldn't the solution be to change the url and keep the search term instead of clearing the search? I'd expect that the reason why users would change the language while searching something would be to get (different) results in another language instead of starting with a clean search? I am not entirely sure though, but I think I would expect that the query is the same after a language change. What do you think (also @f1sh1918 and @LeandraH)?

Edit: Might conflict with #3137.

[LeandraH]

No, I would expect the query to disappear when changing languages, I would expect to not be using the same words in a different language, especially since German is already handled.

Playing around with changing language during a search, I have found both possibilities on other sites.