Revert "Fix large recents and remove dual pane option"

This reverts commit bc3aecd1afcd6032845c3a6d1329653b71d85829.
Revert "Large recents, recents color, dual pane prefs options"
seems that it's ugly..

This reverts commit 9f40b3fa711aa1fa0e405e96d0af060bf78d4842.
Revert "Halo : fix floating activity"

oh, this's not a fix..

This reverts commit 1f0236830f4b2caa0c3ff67b10c5ae7fde5550aa.