[fix] Web ext: fix small icons (remove 16px, to force using 32px icon)

[fix] Remove unused files (bower files)

.bowerrc

-{
-  "directory": "www/lib"
-}

bower.json

-{
-  "name": "cesium",
-  "private": "true",
-  "dependencies": {
-    "ionic": "driftyco/ionic-bower#1.3.5",
-    "ionic-material": "0.4.2",
-    "angular-messages": "~1.5.11",
-    "robotodraft": "1.1.0",
-    "angular": "^1.5.11",
-    "angular-moment": "^0.10.3",
-    "angular-animate": "^1.5.11",
-    "angular-sanitize": "^1.5.11",
-    "angular-resource": "1.5.11",
-    "angular-bind-notifier": "^1.1.11",
-    "angular-image-crop": "^2.0.0",
-    "angular-ui-router": "^0.2.18",
-    "angular-cache": "^4.6.0",
-    "ng-idle": "moribvndvs/ng-idle#^1.3.2",
-    "chart.js": "2.9.3",
-    "leaflet.awesome-markers": "2.0.2",
-    "leaflet-search": "2.7.2",
-    "angular-leaflet-directive": "^0.10.0",
-    "Leaflet.EasyButton": "^2.4.0",
-    "leaflet.loading": "Leaflet.loading#^0.1.24",
-    "ui-leaflet": "^2.0.0",
-    "leaflet.markercluster": "Leaflet.markercluster#0.5.0",
-    "Leaflet.FeatureGroup.SubGroup": "0.1.2",
-    "ion-digit-keyboard": "skol-pro/ion-digit-keyboard#973b90c2fc",
-    "angular-api": "E-IS/angular-api#0.3.0",
-    "angular-screenmatch": "^1.0.1",
-    "angular-file-saver": "^1.1.3",
-    "angular-simple-logger": "^0.1.7",
-    "angular-chart.js": "jtblin/angular-chart#1.1.1",
-    "angular-fullscreen": "E-IS/angular-fullscreen#1.0.2",
-    "leaflet": "0.7.7",
-    "moment": "^2.24.0",
-    "numeral": "1.5.6",
-    "underscore": "1.8.3",
-    "aes-js": "ricmoo/aes-js#3.1.2",
-    "ngCordova": "0.1.27-alpha",
-    "js-scrypt": "1.2.0",
-    "js-nacl": "1.3.2",
-    "angular-translate": "^2.18.1",
-    "socket.io-client": "^1.4.4"
-  },
-  "resolutions": {
-    "angular": "1.5.11",
-    "angular-animate": "^1.5.11",
-    "angular-sanitize": "^1.5.11",
-    "angular-ui-router": "0.2.18",
-    "angular-messages": "1.5.11",
-    "angular-api": "0.3.0",
-    "Leaflet.EasyButton": "~1.3.2",
-    "leaflet": "0.7.7",
-    "leaflet.markercluster": "0.5",
-    "Leaflet.FeatureGroup.SubGroup": "0.1.2",
-    "moment": ">=2.8.0 <2.11.0",
-    "numeral": "1.5.3",
-    "ionic": "1.3.5"
-  }
-}

resources/web-ext/manifest.json

@@ -10,7 +10,6 @@
   "browser_action" : {
     "default_title": "Cesium",
     "default_icon": {
-      "16": "img/logo.svg",
       "32": "img/logo_32px.png",
       "60": "img/logo_60px.png",
       "96": "img/logo_96px.png",
@@ -18,7 +17,6 @@
     }
   },
   "icons": {
-    "16": "img/logo.svg",
     "32": "img/logo_32px.png",
     "60": "img/logo_60px.png",
     "96": "img/logo_96px.png",