applets/weather: Always Round temperature

None of the weather providers still provide decimals for the
temperature, so we just always end up displaying "25.0" as the
temperature. So let's round it to get rid of the unnecessary decimal.

BUG: 453615
FIXED-IN: 5.25
2 jobs for !156 with round-temperature in 1 minute and 18 seconds (queued for 1 second)
latest merge request