* If we fail to find the host path remove the session path since it would
have been created with the socket.
* Only set the LXC log file when the container is about to start.
(LP: #1596020)
* Add a new ContainersConfig Python class for managing all things
ContainersConfig.json.
* Refactor host information into a new HostInfo class.
* Check if the LXC container is defined before trying to start it.
* Remove dependency on DISPLAY variable and use random string to generate
session socket path.
* Prevent showing multiple error dialogs when adding archive fails.
(LP: #1594957)
* Only generate translations when manually running `make translations`.
* Ensure /usr/games is in PATH before launching applications. (LP: #1598227)
* Make error details selectable and add clipboard button. (LP: #1598786)
* Use dialog instead of ActionSelectionPopover to address focusing issues
when installing packages.
* Verify host kernel has lxc support. (LP: #1599193)
* Set DEBIAN_FRONTEND directly in environment for chroot containers.
(LP: #1599246)