This fixes a bug in function that determines what properties to show on the Decimate Keyframes operator.
Before the fix, the "Remove" (i.e., `factor`) slider was visible no matter what "Mode" was being used. This meant that the slider was visible and modifiable when it had no effect, creating confusion.
This patch also changes the UI name of the `factor` property from "Remove" to "Ratio", matching the nomenclature of other decimation operations and modifiers.
| Before | After |
| {F13747781} | {F13747787} |