Add Genexus detection (#2124)

* Add Genexus detection

* Fix genexus image size

* Add Miscellaneous category to Genexus

* Use /gxp\\.js as script regexp

* Remove gx js global to detect Genexus

src/apps.json

@@ -12293,6 +12293,18 @@
       },
       "icon": "Woosa.png",
       "website": "https://woosa.nl"
+    },
+    "Genexus": {
+      "cats": [
+        18, 19
+      ],
+      "icon": "genexus.png",
+      "website": "https://www.genexus.com",
+      "js": {
+        "gx.evt": ""
+      },
+      "html": "<[^>]+class=\"gxp-page\"",
+      "script": "/gxp\\.js"
     }
   },
   "categories": {