* use .entry collection instead of installed.children
* adjust CSS counters
also:
* KeyboardEvent#code is checked first now - available since Chrome48 and FF32
* synthetic click event is cancelable, otherwise FF would open the editor in popup
the USO site reports style installation unconditionally even if you uninstall it in 5 seconds, but we do it only if the style isn't uninstalled during 60 seconds while the popup is open - thus we exclude previewing of styles, which is a very popular use case
We didn't detect that previously and just blindly assumed that a local name is always customized by a user, which is nonsense, obviously. To ensure reliable detection a new property is added to the style object: "originalName". From now on the styles that didn't change their name remotely will be successfully marked as having non-customized names, hence the names will update along with the code. Should be like 99% of styles. As for the remaining 1%, welp, only uninstalling and reinstalling the style anew would switch to the new remote name.
Removed some redundant fixes. Remaining tweaks were mostly info icons. I also applied a hacky margin for checkbox/label options and `.aligned` select options on edit page. They were too close IMO.
Manage: Disable tabindex in nested buttons
Manage: Fix homepage link alignment
Manage: Make entry actions keyboard navigatable
Manage: Add search help accessibility
Msgbox: Save and restore focus
Manage: Fix delete confirmation cancel
Manage: Make history button accessible
Manage: Make favicons dropdown accessible
Manage: Prevent focus on hidden textarea
Msgbox: Stop tabbing outside of msgbox
Usercss: Make nondefault reset accessible
Usercss: Make colorpicker accessible
Edit: Disable tabindex in nested buttons
Edit: Make info and config icons accessible
Options: Cleanup HTML
Options: Make advanced toggle accessible
Edit: Fix issues popup
Edit: Remove link underlines from icons
* caching of search results and downloaded style info for one day
* no prefetching of styles
* only the next search results page is prefetched in unattended fashion
* the "configure" button is shown only after installation
* join the code in one closure, regroup and simplify some functions
