more accurate cursor for message list
|Reported by:||nturner||Owned by:||alec|
When the pointer is over the message list, the cursor is a hand. This indicates that a single click will take you somewhere. This patch changes the cursor for the message list to the default arrow cursor, which indicates that a single click will select the item under the pointer, and that a double click will activate it. This is more in line with how RoundCube actually behaves.