Slim recent: fix left edge recents feature on hdpi devices

Due to missing drawables the left edge features from Slim recents fc's on HDPI devices. This commit adds missing png's fixing the fc.

Change-Id: I651ddc77e22e23b13f1188a0758edd257620bbb2
Signed-off-by: Arnav Gosain <nolinuxnoparty@gmail.com>