- If user enter text, keep original. If user enter a number, treat it as temperature:
  + Display unit in SVG
  + Apply unit conversion on entered text
- Increase chart range: 10% of total variability. For example: if the temperature change from 1 to 100. We have: (100 - 1) * 0.1 = 9.9,  the chart range is from 8.9 to 109.9. With this way, the temperature line can fit within the chart
- Resolves #667 #668 #669