Design review on the new layout

!29 (merged) got merged, which is great! However, there are quite a few rough edges to work through, as well as aspects of the design that are yet to be implemented. This is an initial list to be going on with.

General

• Temperature units should use ° only, not °C or °F
• The large icon should use the detailed, colour version of the icon - not the symbolic version
• The last updated time is missing from the bottom
• The attribution label is missing from the bottom
• Chart backgrounds should be white
• Symbolic weather state icons should be coloured
• Charts should be scrollable (mouse wheel, two fingers on a touchpad) and draggable (pointer, finger)

Hourly chart

• margin-top on the time should be 18, not 6
• spacing on the hour entry should be 18, not 6
• The chart's Y axis should cover the temperature range for the day (low temp to high temp), not the range from 0 to the high temp. This will make temperature changes easier to see and will improving responsiveness. See below:

Daily chart

• Columns should be wider (they're ~100px wide in the mockups)
• Vertical spacing:
  • Day and date should be grouped, with 6px vertical spacing
  • High and low temp should be grouped, with 12px vertical spacing
  • Spacing within Gjs_DayEntry should be 18px, and there should be 18px padding at the top and bottom
• Date should be small text - 9pt
• Temperature labels should be colored
• Various issues with the popovers:
  • Columns are headed with incorrect icons - they all have the wind icon, whereas the icons should be temperature, precipitation and wind
  • Times of day should use small text - 9pt
  • Columns are too wide
  • Wind shouldn't include direction