Handling of window.open/target=_blank with tabs.background = False

[The-Compiler]

Right now we open window.open links in a background tab when tabs.background is set to False, so that Ctrl-Shift-Click on an element does the right thing.

We should probably have a setting (maybe even true by default) which breaks ctrl-shift-click instead, but does the right thing with window.open.'

[jgkamat]

A quick half-baked discussion about this:

<jgkamat> The-Compiler:
    https://github.com/qutebrowser/qutebrowser/issues/3231 is really
    bugging me, would you prefer a new setting (something like
    tabs.background.force) or new values in the existing setting
    {default, invert, force-on, force-off} 
<The-Compiler> jgkamat: can't have tabs.background.force shadowing
    tabs.background though :)
<jgkamat> er, yah :P
<jgkamat> tabs.background_force or something
* jgkamat is horrible at naming things in general
<The-Compiler> wonder if we should just change it without a setting
    and see if anyone complains
<jgkamat> I would be fine with it, personally force-on/force-off make
    the most sense to me, the default browser behavior just confuses
    me xD
<jgkamat> but I could imagine some people want exactly what
    firefox/chrome does (which correlates to tabs.background true)
<The-Compiler> but firefox/chrome probably also handle window.open the
    same as ctrl-clicking links, no?
<jgkamat> The-Compiler: firefox at least opens ctrl-click in the
    background and window.open (I think) in the foreground
<The-Compiler> hm, true
<The-Compiler> same in Chromium too
<jgkamat> oh you know what, we can't actually change this because
    https://github.com/qutebrowser/qutebrowser/blob/master/qutebrowser/browser/webelem.py#L347-L350
<jgkamat> we would break tab_bg when force_on is true...
<The-Compiler> I think tab_bg would work (because all tabs open in the
    background then), but opening it as a foreground tab won't
<jgkamat> yah, it wouldn't work (tab_bg or tab_fg) for both "force"
    settings, either on/off
<jgkamat> I'll think about this tomorrow after I sleep :/
<The-Compiler> I'll think about this after my exams are done :P
<jgkamat> I suspect this could break rapid mode as well aah. I'm just
    going to set hints.background=true and change all my bindings to
    tab_fg -_-

[The-Compiler]

Note this also affects "Open in new tab" in the context menu.