VSCode Tab API not working for multiple tab bars

[jonah-iden]

Bug Description:

It seems like when #12109 was implemented the viewCollumn property was not correctly implemented.
This needs to be retrofitted.
see https://github.com/eclipse-theia/theia/pull/12109/files#diff-cf9def33dbeeb0cd3fa2f7b8026959104e2461870a8c5c8c1dfd7487fad6ac9eR145

Above that there are some more discrepancies.

• in VSCode the active tabbar is always set
• there is always at least one tabgroup existing

[tsmaeder]

The fact that TabGroups.activeTabGroup can be undefined causes an Exception at startup in the typescript-language-features 1.88.1 version

[jonah-iden]

@tsmaeder if you find the time could you by any chance test this extension in vscode. Out of some weird reason the tab API seems to be broken there and im only receiving close events in the extension.

Edit: Forget that i just made a really dumb mistake