Bug 1096245 - Character counter CSS needs tweaks on Windows. r=aleth

--HG--
extra : rebase_source : 7fcaf3dca7df7ba0b680184eab7f5bfa8b7a29d2
Bug 1103418 - Use Object.assign instead of copySharedBaseToPrototype. r=clokep
Bug 1102527 - Rejoin message no longer shown. r=clokep
Bug 1102892 - Passwords gone after update - port bug 1030059 for Thunderbird. r=clokep a=clokep

--HG--
extra : amend_source : 0dcff27b1ff56665d7da2ec6f328e78150329955