added + btn to main window

doc/mockup/main-window_mockup.json

@@ -67,7 +67,7 @@
                     "properties": {
                         "text": "Tags\n\nKugel, Holz, Hell,Weiß\n\n\nMeta\n\nGröße: 8MP\nName: cnysreutxet.png\nAnderes: bla bla\n\n\n",
                         "bold": "false",
-                        "color": "10066329"
+                        "color": "10470904"
                     }
                 },
                 {
@@ -358,6 +358,22 @@
                     "measuredH": "27",
                     "x": "68",
                     "y": "544"
+                },
+                {
+                    "ID": "52",
+                    "typeID": "Icon",
+                    "zOrder": "27",
+                    "measuredW": "48",
+                    "measuredH": "48",
+                    "x": "1149",
+                    "y": "603",
+                    "properties": {
+                        "icon": {
+                            "ID": "plus-circle",
+                            "size": "large"
+                        },
+                        "color": "472931"
+                    }
                 }
             ]
         },
@@ -367,4 +383,4 @@
         "measuredH": "684",
         "version": "1.0"
     }
-} 
+}