Blender Git Loki

Graph Editor: Ctrl-Click keyframing now deselects all existing keyframes by default

Now, when creating new keyframes in the graph editor by ctrl-clicking, only
the newly created keyframes will be selected. This is a little workflow tweak
to make it faster to work, as you no longer have to deselect all, and then
re-select the newly added keys in order to manipulate them.

The old behaviour (not modifying the selection status of the old keys) has been
kept, but is now available via Shift-Ctrl-Click.

Feature request from @Shhlife