CB-8029 test 1-based indexing for confirm

Added to the expected results -- remember to check 1-based indexing in the
confirm manual tests.
CB-8038 backslash getting escaped twice in bb10

Removed unnecessary escaping of backslash char in notifications for bb10,
as they are already escaped in the js.
Merge branch 'CB-8029' of https://github.com/stacic/cordova-plugin-dialogs
Merge branch 'CB-8038' of https://github.com/stacic/cordova-plugin-dialogs