added 'downloading' and 'error' states;
changed downloading to async job;
empty forecast form doesn't show;
fixed thread violation when loading meteogram and forecast is visible;
moved models and languages to xml files;
added name and displayname to forecast model;
added proper sidebar url to model;
now cities holds all names;
meteogram language changes language of cities in combobox onShow (needs fix
in localization);
fixed meteogram hide on trayicon click (when meteogram is already shown);
added some test things to show city name on meteogram
added displaying name of a city on the meteogram;