This moves the clear paths button ("X") to the same line of "Update All Paths",
and make it visible at all times.
1. The clear button affects all objects (by default). However the
Calculate/Update Paths only works on the selected objects/objects.
Better to not have them both on the same line.
2. The operator to clear object and pose paths can run even if the active
object/bone has no motion path. However the UI was not showing the button in
those cases.
Before:
{F12757500, size=full}
After:
{F12757502, size=full}
Differential Revision: https://developer.blender.org/D13609