Remove unused UI elements

[kdzwinel]

(preserve log, clear cache, screencapture, clear cookies, hide data URLs).

Sadly, there was no config to disable these elements. I'm still not sure if removing them from the DT code is the best way to hide them. Updating DT code in the future will get complicated. On the other hand, hiding them via display:none seems like a hack + it'd be hard to target all these elements via CSS (e.g. context menu).

Preview:

Fixes #5

[samccone]

we should kill throttling also right?

[kdzwinel]

I thought about keeping it for #9, but you are right, let's kill it until it's actually needed. Showing it back again would be a matter of reverting my last commit here.

[portellaa]

Wouldn't be great to have a preference panel to configure which menus/panels the user wants to use? Doesn't knows if makes sense or is so useful that worths the work.

[samccone]

hey @portellaa if these UI elements were functional it would be useful, however these UI elements are non-functional at the moment so hiding them is probably a decent idea :)

[kdzwinel]

IMO most of these UI elements didn't make much sense in the context of Betwixt (e.g. there is no cache or cookies that we can clear). Throttling will be back as soon as it will be implemented (see #9).

[kdzwinel]

I hear no objections so I'm merging 💥