Many small overall UI improvements

- proxy are now aware of their respective features;
- updated account status info and added also proxy info (especially to show when using an offline copy)
- conditionally enabled different features across the UI, based on user account / proxy available features

frontend/delta/fonts/IcoMoon/Clipperz Icon font.json

@@ -4,28 +4,30 @@
 		{
 			"icon": {
 				"paths": [
-					"M640.9 63.9c-141.4 0-256 114.6-256 256 0 19.6 2.2 38.6 6.4 56.9l-391.3 391.2v64l64 64h128l64-64v-64h64v-64h64v-64h128l70.8-70.8c18.7 4.3 38.1 6.6 58.1 6.6 141.4 0 256-114.6 256-256s-114.7-255.9-256-255.9zM384 512l-320 320v-64l320-320v64zM704 320c-35.3 0-64-28.7-64-64s28.7-64 64-64 64 28.7 64 64c0 35.3-28.7 64-64 64z"
+					"M704 0c-176.73 0-320 143.268-320 320 0 20.026 1.858 39.616 5.376 58.624l-389.376 389.376v192c0 35.346 28.654 64 64 64h64v-64h128v-128h128v-128h128l83.042-83.042c34.010 12.316 70.696 19.042 108.958 19.042 176.73 0 320-143.268 320-320s-143.27-320-320-320zM799.874 320.126c-53.020 0-96-42.98-96-96s42.98-96 96-96 96 42.98 96 96-42.98 96-96 96z"
 				],
-				"width": 896,
 				"attrs": [],
 				"isMulticolor": false,
 				"tags": [
-					"key"
+					"key",
+					"password",
+					"login",
+					"signin"
 				],
-				"defaultCode": 61513,
+				"defaultCode": 57802,
 				"grid": 16
 			},
 			"attrs": [],
 			"properties": {
-				"id": 91,
-				"order": 23,
+				"id": 548,
+				"order": 26,
 				"prevSize": 32,
-				"code": 61513,
-				"name": "key",
-				"ligatures": "generate password"
+				"code": 59789,
+				"ligatures": "generate password",
+				"name": "key"
 			},
-			"setIdx": 0,
-			"iconIdx": 91
+			"setIdx": 1,
+			"iconIdx": 141
 		},
 		{
 			"icon": {