Implemented auto selection of a saved adapter

The chosen adapter can not be set to be remembered the next time the
program is started. The program will be started with this adapter if
it's available, or display the normal interface if the adapter could not
be found. The feature can be disabled or re-enabled from settings.
(Implements feature request #6)
Added missing copyright notice to updater

The source files for the updater now contains the copyright notice.
Replaced placeholder layout content

The placeholder content in various layouts replaced with more
descriptive strings rather than examples.