kcms/energy: Smoothly animate the time span changes
Add a smooth transition to the graph when the user changes the selected time span.
| BEFORE | AFTER |
|---|---|
| energy-smooth-before | energy-smooth-after |
Add a smooth transition to the graph when the user changes the selected time span.
| BEFORE | AFTER |
|---|---|
| energy-smooth-before | energy-smooth-after |