Mobile controls (#262)

* added readme pt-pt

* added url/querystring deps and fix chat pos/scale

url and querystring were missing in node_modules.
chat scale option wasn't implemented and chat input was on top instead of bottom.

* added bot version text field and guiScale for small screens

text field to choose bot version. gui scale changes on small screens (slider takes no effect then). Removed unused images.

* added mobile controls

* fixed bot and chat

* mobile controls only appear on mobile or if forced

* lint fix

lib/menus/components/common.js

@@ -42,6 +42,12 @@ const commonCss = css`
   }
 `
 
+/** @returns {boolean} */
+function isMobile () {
+  const m = require('ismobilejs').default()
+  return m.any
+}
+
 /**
  * @param {string} url
  */
@@ -60,6 +66,7 @@ function displayScreen (prev, next) {
 
 export {
   commonCss,
+  isMobile,
   openURL,
   displayScreen
 }