Move "Security" and "Insights" repository tab to `more-dropdown`

[fregante]

#3346 restored more-dropdown but now we also need to move the Security and Insights tabs to it, like it was before the "Repository refresh"

Possible way to do it:

• remove tabs from dom and show/enable the items in the dropdown

Gotchas:

• the DOM order of the menu matters, so you probably need to also move them at the end of the dropdown, after "Settings"

[Xottab-DUTY]

This is ridiculously inconvenient! We need some mechanism to be able to configure what should be in the more-dropdown and what should be on top.

I just spent 15+ minutes to find out what the heck and where is my Insights button...

[busches]

@Xottab-DUTY you can disable the feature and keep the tabs where they started. We won't be adding a configuration option for this, at most we could split each tab into it's own feature.

[fregante]

If you need those tabs, you can disable more-dropdown, it can't be split