beat.jost,
Thank you for trying CodeMix. You are right that the ‘Find References’ works for TS files in Webclipse.
With CodeMix, the ‘Find References’ feature is not yet supported. I have filed an enhancement request for the dev team to support it in CodeMix editors.
Thank you for raising it. Please let us know if you see any other issues with CodeMix.
–Swapna
Genuitec Support