modified listView of devices
+ List of devices now has undo option when deleted by swiping left or
right

+ Known issue -> can't delete when there is only one item left
Restored save data mode when welcome activity stops

* Found another bug in listView when trying to remove device in the
middle of list.
changed swipeToDismiss with contextual view to simple dismiss because of
all the bugs. stable version 1.1

* only issue is when created a new device you can't swipe deleted right
away.