rm dashboard support with polymer

apps/xaal-webui/README.rst

apps/xaal-webui/dashboard.py

apps/xaal-webui/run.py

apps/xaal-webui/static/bower.json

apps/xaal-webui/static/bower_components/jquery/.bower.json

...xaal-webui/static/bower_components/jquery/MIT-LICENSE.txt

apps/xaal-webui/static/bower_components/jquery/bower.json

.../xaal-webui/static/bower_components/jquery/dist/jquery.js

...l-webui/static/bower_components/jquery/dist/jquery.min.js

...-webui/static/bower_components/jquery/dist/jquery.min.map

apps/xaal-webui/static/bower_components/jquery/src/ajax.js

...al-webui/static/bower_components/jquery/src/ajax/jsonp.js

...aal-webui/static/bower_components/jquery/src/ajax/load.js

...ebui/static/bower_components/jquery/src/ajax/parseJSON.js

...webui/static/bower_components/jquery/src/ajax/parseXML.js

...l-webui/static/bower_components/jquery/src/ajax/script.js

...ebui/static/bower_components/jquery/src/ajax/var/nonce.js

...bui/static/bower_components/jquery/src/ajax/var/rquery.js

...xaal-webui/static/bower_components/jquery/src/ajax/xhr.js

...al-webui/static/bower_components/jquery/src/attributes.js