Feature/mob 162 smartbanner (#274)

* Implemented according to instructions but not working

* Exclude touch screen windows (see in Issues on library repo)

* Make the banner generic

* Moved icon_url to generic section

* Hide in Safari

* Use injection script with ENV variables instead manual update

* debugging

* Use CDN for js and css

* PR

.env.example

@@ -13,3 +13,9 @@ BUGSNAG_API_KEY=
 IOS_APP_ID=
 INTERCOM_APP_ID=
 STATUS_PAGE_SCRIPT_URI=
+
+SMARTBANNER_APP_NAME=
+SMARTBANNER_ORG_NAME=
+SMARTBANNER_ICON_URL=
+SMARTBANNER_APPSTORE_URL=
+SMARTBANNER_GOOGLEPLAY_URL=