use cardview at the tasker list as well

Change-Id: Ie9590899a46fb09c5e9a76d8ca6fb05be85fd113
change the margins of the list items

Change-Id: I43812f15d95f20beec4936aa0567f7b4ab93f1f8
make the list properties prettier

Change-Id: I4fe41094578bf01cf2b89c4605038f268ec844da