WebView: Add warning to users re: major security hole in Browser

Currently if a user stores  a username and password in the browser, they are are being
stored in a database as plain text, which can be a huge breach of security. Add a warning
to the dialog until a proper fix is put in place

Signed-off-by: bmc08gt <bmc08gt.teamb00sted@gmail.com>
Change-Id: I63101ca5d0e5b3f754b4cb0a7542525d93520057