No hard code

[jannisCode]

What it does

This commit has a refachoring for the filters in the Call Hierarchy

Author checklist

• I have thoroughly tested my changes
• The change is following the coding conventions
• I have signed the Eclipse Contributor Agreement (ECA)

[iloveeclipse]

May I ask for a proper commit messages and also appropriate PR description?
This is not OK:

0ce9a03 better code maybe??
a6dc859 Revert "better code maybe??"
b8d2ce1 Better code now (Less hard code)

See https://github.com/eclipse-jdt/.github/blob/main/CONTRIBUTING.md#commit-message-recommendations

[jannisCode]

I am really sorry i had some problems with my commits and git in general. Thats why I created a new PR with the right commit and a better commit message.
Again I am really sorry for the confusion.