Bug 1563617 - Quantumbar: Set rolluponmousewheel="true" so that you can scroll in pages while the popup is open. r=dao

With awesomebar we got this for free because nsXULPopupManager checks the "type" attribute of the popup element.  If it starts with "autocomplete", rolluponmousewheel is effectively true [1].  We got rid of the type attribute in quantumbar since it wasn't otherwise necessary.

[1] https://searchfox.org/mozilla-central/rev/07f7390618692fa4f2a674a96b9b677df3a13450/layout/xul/nsXULPopupManager.cpp#361

Differential Revision: https://phabricator.services.mozilla.com/D38136

--HG--
extra : moz-landing-system : lando

browser/components/urlbar/UrlbarInput.jsm

@@ -71,6 +71,7 @@ class UrlbarInput {
                flip="none"
                consumeoutsideclicks="never"
                norolluponanchor="true"
+               rolluponmousewheel="true"
                level="parent">
           <html:div class="urlbarView-body-outer">
             <html:div class="urlbarView-body-inner"