Bug 1320564 - Fix the default value logic for "selected" when creating a new tab. r=sebastian

The idea is that cancelling edit mode when opening a new tab implies that we want to select it as well, otherwise we wouldn't have to cancel edit mode in the first place.

MozReview-Commit-ID: Gova1ymzlHn

--HG--
extra : rebase_source : a1d957de82a5e1ec9bf9162e1f01641e34e16ab4

mobile/android/chrome/content/browser.js

@@ -3495,7 +3495,8 @@ Tab.prototype = {
         parentId: ("parentId" in aParams) ? aParams.parentId : -1,
         tabIndex: ("tabIndex" in aParams) ? aParams.tabIndex : -1,
         external: ("external" in aParams) ? aParams.external : false,
-        selected: ("selected" in aParams || aParams.cancelEditMode === true) ? aParams.selected : true,
+        selected: ("selected" in aParams || aParams.cancelEditMode === true)
+                  ? aParams.selected !== false || aParams.cancelEditMode === true : true,
         cancelEditMode: aParams.cancelEditMode === true,
         title: truncate(title, MAX_TITLE_LENGTH),
         delayLoad: aParams.delayLoad || false,