Better feedback via alerts/icons/tooltips

[narc0tiq]

Currently it's perfectly simple to explain why an ore site is above the fold or not: it either has less than 10% ore remaining, or it doesn't. With #11, however, more conditions for prioritizing sites will appear, and it becomes important to tell what's causing a site to show in the minimized listing.

• coloring (as per Colorize ore-per-minute based on its value, not the percentage remaining #12, Colorize ETD based on its value, not on site remaining percentage #13) can help to clarify at a glance, but some conditions are too opaque for this
• an alert window could show textual feedback along the lines of "Warning: site NE 123 is below 10% ore remaining" or "Warning: site S 2401 estimates only 10 minutes until depletion!"
  • alerts could also have dismissal buttons, including one which could also trigger the site to stop showing above the fold based on the ignored warning condition
• a set of icons can be shown alongside the site... name? to highlight unusual conditions (was mining but now is idle, etc.)
• tooltips might be possible for these icons, to describe them briefly to players that don't know (or don't remember) what they mean