Setting widget refresh rate to 0 disables automatic updates.
Avoid NPE.
Persist the Zabbix authentication token which is shared between the app and the widgets. A login is only triggered if the token expires, or if the user triggers a full refresh.
Cleanup; improve list widget view during refresh.
1x1 widget: fix status image click.
Ignore disabled problems (either the trigger, the item or the host is disabled).
Closes #23.
Trigger description includes correct host names whenever possible.
Import only host IDs with triggers/events/applications to improve data usage.
Import host groups only when necessary.
Items no longer import host information as only the host ID (which is included by default) is needed.
Improved data usage at various locations.
List widget: add error view.
Bugfix: ensure that host groups are always available (for the host group spinner).
Fix NPE.
Update version info to 2.1.0 (23).