shell: sane warnings in logcat

Sometimes we can return earlier to save a few cpu
cycles if a certain file doesnt exist at all.

This will also reduce the logcat spam for devices
with hotplugable cores.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>
overview: disable animation and finish layout

Just disable animation, its useless and only causes troubles.
Also change the look&feel so different resolutions can take
advantage from this.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>