Revert "Removing Windowgrid, moving to official extras"

This reverts commit 2457da21b7351db9cf28693632b47caf5705fa72.

settings/windowgrid/WindowGrid.settings

@@ -0,0 +1,39 @@
+{
+    "App":
+    {
+        "Portable": true,
+        "SplashScreen": false,
+        "UpdateOnStart": false,
+        "UpdateSilent": false
+    },
+    "Grid":
+    {
+        "GridX": 60,
+        "GridY": 34,
+        "BlurRadius": 3,
+        "FillWindow": true,
+        "Opacity": 0.75,
+        "RadialGradient": true,
+        "ThemeName": "default",
+        "Themes":
+        [
+            {
+                "Name": "default",
+                "ColorLine": "#FF00BDD4",
+                "ColorStart": "#FF0097A7",
+                "ColorEnd": "#FFB2EBF2"
+            }
+        ]
+    },
+    "Input":
+    [
+        {
+            "Key": "MOUSE_RBUTTON",
+            "Command": "Resize"
+        },
+        {
+            "Key": "MOUSE_MBUTTON",
+            "Command": "Move"
+        }
+    ]
+}