Changes

|Thimble UI improvements || https://bugzilla.mozilla.org/show_bug.cgi?id=911169, https://bugzilla.mozilla.org/show_bug.cgi?id=901075etc ||[Pomax, cappleton, k88hudson, thecount] ||

| Popcorn Maker Improvements and fixes|| https://bugzilla.mozilla.org/show_bug.cgi?id=909428 <br> https://bugzilla.mozilla.org/show_bug.cgi?id=909751 <br> https://bugzilla.mozilla.org/show_bug.cgi?id=907766 <br> https://bugzilla.mozilla.org/show_bug.cgi?id=900580 <br> https://bugzilla.mozilla.org/show_bug.cgi?id=890416 <br> https://bugzilla.mozilla.org/show_bug.cgi?id=859116 || [mjschranz, thecount] ||