Give KeyframeView focus back to make shortcuts working
Related to #153
How do I select the keyframes? Shift+g still grabs the clips and rubber selecting doesn't work either. Thanks :)
Click on a keyframe (it becomes red) now you can use +/- and left/right arrow key
Great! Suggestion: Instead of -/+ can we have up/down arrows just like left and right? Is there a way to rubber select or with ctrl + select various keyframes?