does not refresh weather forecast sometimes

[wernegrh]

often I get old weather forecast. To summarize first, in total 3 issues:

• often no internet connection, even if other apps work fine
• then cached data shown, but old weather forecast makes no sense or should be marked clearly
• overview and hourly display show no date, which would help in case of old forecasts too

In detail:

• if I do refresh (DE: "Neu laden"), the app complains "No internet connection. Page loaded from cache" (DE: "keine Internetverbindung. Seite wird aus dem Cache geladen")
• internet is working fine with other apps
• sometimes the only way around then is clearing the cache in settings/apps/FOSS weather, then it works - sometimes new forecast is shown, if you change to other bookmarked place and back again
• a cache for weather forecasts should have a very limited lifetime anyway, it makes no sense in my eyes to show old forecasts
• at least cached forecasts could be marked as "old"
• the display could show the date of the forecast (only 10 days view shows it), not only "today" and "tomorrow", hourly shows only time, this is misleading, if some problem (like the one above) occurs