Add BETA label to ModelVerse toolbar. Add icons.

users/(default)/Toolbars/ModelVerse/ModelVerse.buttons.model

@@ -560,7 +560,7 @@
 				},
 				"tooltip": {
 					"type": "string",
-					"value": "Connect to the ModelVerse"
+					"value": "(BETA) Connect to the ModelVerse"
 				},
 				"code": {
 					"type": "code",
@@ -575,7 +575,7 @@
 				},
 				"tooltip": {
 					"type": "string",
-					"value": ""
+					"value": "(BETA) Load a model from the ModelVerse"
 				},
 				"code": {
 					"type": "code",
@@ -590,7 +590,7 @@
 				},
 				"tooltip": {
 					"type": "string",
-					"value": ""
+					"value": "(BETA) Save a model to the ModelVerse"
 				},
 				"code": {
 					"type": "code",