Adding a min width and a min height for the main window

[waterflow80]

PR Description

Fixes #9606

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[calixtus]

Hello @waterflow80 , thanks for your interest in JabRef and open source programming. Can you provide some more information on your changes please? What is your motivation for your change, is there an issue related to your changes, why would be a minimum height oder width necessary, why exactly 330 px? Thanks!

[calixtus]

Also please note that the checklist is mandatory.

[waterflow80]

@calixtus Thank you for your feedback.

I think having the app's window resized until it's no longer seen is not a good thing, as it's shown in the
GIF image in the issue #9606 description. And almost every app has a minimum window size.

I also specified the reasons why I've chosen the values of the minHeight and the minWidth in the issue #9606 , although
these values can be discussed or reviewed.

[HoussemNasri]

I don't think the comment is necessary

[waterflow80]

@HoussemNasri Thank you for your feedback, I'll remove it if necessary.

[koppor]

Discussed in DevCall. It is OK. More comments are in the issue.