Fix mac/linux config and style cleanup

Breeze.UI/electron-builder.json

 {
   "appId": "com.stratisplatform.breeze",
   "productName": "Breeze Wallet",  
-  "mac": {
-    "category": "com.stratisplatform.breeze"
+ 
   },
   "directories": {
       "app": "dist",
@@ -19,9 +18,15 @@
         "deb",
         "tar.gz"		
 	    ],
+     "synopsis": "Breeze Wallet Graphical User Interface",
 	    "category": "Utility",
 	    "artifactName": "${productName}.v${version}.setup.${os}.${arch}.${ext}"
   },
+  "mac": {
+     "target": ["dmg"],
+     "category": "public.app-category.productivity",
+     "artifactName": "${productName}.v${version}.setup.${os}.${arch}.${ext}"
+  },
   "nsis": {
      "oneClick": false,
 	    "perMachine": true,