Update Forecast styles

[Vinicius-Madeira]

Summary

Updated some of the CSS styles to be a bit more pleasant in my opinion.

Changelog

• Fix Centralize Forecast option that was actually aligning it to the end instead of the center (Red border).
• Reduced the padding-left and padding-right properties of the 'today-databox' (Red border). Now they're closer to each other.
• Reduced the min-height/min-width properties of the 'forecast-databox' (Green border) and the 'forecast-day' (Violet border). Now they're not so distant from one another.

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Examples

Some examples without the border lines in a few languages:

English:

Portuguese:

Greek:

German:

[penguin-teal]

Looks a lot better, thank you!