``Development``: Fix for coloring elements in Apollon

[minrows]

Checklist

• [x] I added multiple screenshots/screencasts of my UI changes

Motivation and Context

This PR fixes the issue with the filling the elements in Apollon. Issue Number: https://github.com/ls1intum/Apollon/issues/232

Steps for Testing

1. Goto to test server
2. Try filling the colors of elements as illustrated in Screenshots section

Screenshots

Todos:

• [x] Release beta version of Apollon from this branch
• [x] Point standalone to this newly created release
• [x] Deploy that standalone to test server

[martindevtum]

code looks good. will test once it is on the test server. did you check, wether the fills are also visible when exported as svg?

[minrows]

code looks good. will test once it is on the test server. did you check, wether the fills are also visible when exported as svg?

Yes @martindevtum. Its working as expected.

[minrows]

Its now deployed in test server.