Make the value to text mapping more similar to singlestat solution.
Adds more tests.
Also, allows string to be mapped to other string besides numeric values.
* colorpicker: fix opening error when color is undefined
* colorpicker: replace spectrum picker by new color picker
* colorpicker: remove old spectrum picker directive
* annotations: use tinycolor for working with region colors
This changes introduce milliseconds format option in table panel
config GUI. Current grafana support milliseconds in time and
actually used at graph panel, however current table does not
provide the way to show milliseconds. This fix is to add format
in table panel to show milliseconds in table as well as graph.
