* Utils: Use 's' as default for unit-less intervals
If the user specifies a string that is a unit-less number, it is
assumed that they meant seconds.
Fixes#22362
* Rephrase tooltip for better line break position
* update fixed
* update fixed
* update fixed
* don't change any tests
* add mising space
* Custom unit formats
* return a string for kbn
* return a string for kbn
* return a string for kbn
* Simplify unit tests
* More units
* fix more tests
* fix more tests
* fix more tests
* format values
* format values
* TimeSeries to string
* more kbn tests
* use the formatted value
* BarGauge: Fixed font size calculations
* support prefix
* add si support
* avoid npe
* BarGauge/BigValue: value formatting
* fix some tests
* fix tests
* remove displayDateFormat
* another unicode char
* Graph: Use react unit picker
* Updated unit picker
* Fixed build errors
* more formatting
* graph2 tooltip formatting
* optional chaining
