fix: force controlled on combobox

[jqpe]

Fixes the following error introduced in #279:

A component is changing from uncontrolled to controlled. This may be caused by the value changing from undefined to a defined value, which should not happen.

Closes the following Sentry issue:
https://junat.sentry.io/share/issue/b7e154ebbaf74ced91b31be9c221077f/

[vercel]

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[github-actions]

📦 Next.js Bundle Analysis for junat.live

This analysis was generated by the Next.js Bundle Analysis action. 🤖

🎉 Global Bundle Size Decreased

Page	Size (compressed)
global	168.41 KB (🟢 -14.97 KB)

Details

The global bundle is the javascript bundle that loads alongside every page. It is in its own category because its impact is much higher - an increase to its size means that every page on your website loads slower, and a decrease means every page loads faster.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

If you want further insight into what is behind the changes, give @next/bundle-analyzer a try!

One Page Changed Size

The following page changed size from the code in this PR compared to its base branch:

Page	Size (compressed)	First Load
/_error	675 B (🟡 +6 B)	169.07 KB

Details

Only the gzipped size is provided here based on an expert tip.

First Load is the size of the global bundle plus the bundle for the individual page. If a user were to show up to your website and land on a given page, the first load size represents the amount of javascript that user would need to download. If next/link is used, subsequent page loads would only need to download that page's bundle (the number in the "Size" column), since the global bundle has already been downloaded.

Any third party scripts you have added directly to your app using the <script> tag are not accounted for in this analysis

Next to the size is how much the size has increased or decreased compared with the base branch of this PR. If this percentage has increased by 10% or more, there will be a red status indicator applied, indicating that special attention should be given to this.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e2bc046) 77.23% compared to head (8b998d7) 78.24%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #284      +/-   ##
==========================================
+ Coverage   77.23%   78.24%   +1.00%     
==========================================
  Files         105      105              
  Lines        1797     1797              
  Branches      260      260              
==========================================
+ Hits         1388     1406      +18     
+ Misses        323      310      -13     
+ Partials       86       81       -5     

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