Fix bugs

- When you click on a graphic (cluster) with draw tool on, the cluster does not expand anymore
- Measure cursor stay on between measure
- Double click on measure add a last point
- Delete extent now is with a grey line instead of red
- Tools panel height is set properly in FireFox
- When esc key press, tools panel open or close only once (bug in Safari)
- When you measure a line with 2 points, length was 0. It is now fix
- When you change selection for a radio button in the legend, the layer will not show if parent checkbox is uncheck
- Double click for measure in FireFox works now.
- Faster tooltips
- Tools container not selectable
- Github link in a new page
- Sprite header WCAG
- Data CSV for FF
- Add CSV, show error message if fails
- Add CSV now works on IE 10. For IE9 there is a message to told this functionality is disable
- Set overview at start