Tab previews should be cached on disk

[Olivier Tilloy]

With the current tab preview implementation, previews are displayed only for tabs that have an active webview. Since we currently limit the number of webviews to 2, that means that other tabs don’t get a preview.
Similarly, when restarting the app after closing it, only the preview for the current tab is visible in the tabs view, because other webviews haven’t been instantiated yet.

We need a mechanism to persist previews on disk so that their availability isn’t tied to the actual webview.

[Olivier Tilloy (osomon)]

Note that this is a prerequisite for the bottom-edge tabs view implementation.

[Launchpad Janitor (janitor)]

This bug was fixed in the package webbrowser-app - 0.23+15.04.20141211.4-0ubuntu1

---------------
webbrowser-app (0.23+15.04.20141211.4-0ubuntu1) vivid; urgency=low

  [ Ubuntu daily release ]
  * New rebuild forced

  [ Olivier Tilloy ]
  * Take captures of live webviews and cache them on disk, to use them
    as tab previews. (LP: #1359293, #1401045)
  * Fix FTBFS on Qt 5.4. (LP: #1398372)
  * Reset the webview’s certificate error when the user cancels it (by
    e.g. committing a new navigation). (LP: #1398905, #1394925)
 -- Ubuntu daily release <email address hidden> Thu, 11 Dec 2014 18:54:12 +0000

[Olivier Tilloy (osomon)]

Landed in vivid. It now needs to be backported to rtm-14.09 as it is a prerequisite to implement bottom edge gesture in the browser.

[Launchpad Janitor (janitor)]

This bug was fixed in the package webbrowser-app - 0.23+15.04.20141218~rtm-0ubuntu1

---------------
webbrowser-app (0.23+15.04.20141218~rtm-0ubuntu1) 14.09; urgency=low

  [ Leo Arias ]
  * Refactor the address bar autopilot helpers so they can be used from
    external test cases.
  * Expose on the autopilot helpers the back and forward functionality.

  [ Olivier Tilloy ]
  * Update translation template.
 -- Ubuntu daily release <email address hidden> Thu, 18 Dec 2014 18:40:11 +0000