[browser] Bottom edge swipe is propagated to web apps

[Oren Horev]

build #90

When launching the HUD over the region of a web app running in sidastage the swipe is passed to the app and the app scrolls along the swipe. The same swipe over the browser running another scrollable page is not passed.

to reproduce
launch scrollable webpage in browser
launch twitter
edge swipe through sidestage region
twitter feed scrolls with swipe

expected behaviour
web page doesn't scroll;

[Olivier Tilloy (osomon)]

This is actually an issue in the browser itself: the current assumption is webapp == chromeless (see bug #1116412), meaning that for webapps there is no chrome at all, so no bottom toolbar that can be swiped upwards.

I’m guessing that this will be resolved once we switch to a standard SDK toolbar (see bug #1130446).

[Olivier Tilloy (osomon)]

It appears this is not solved by using the standard SDK Panel component. If the panel is locked in place, hidden (which is the case for webapps, in chromeless mode), the bottom edge swipe is still propagated to the webview, thus triggering a scroll.

[Olivier Tilloy (osomon)]

Lowering the importance, as now most of (if not all) the webapps display some chrome, so the issue is not observable any longer.