saved layout (#62)

* saved layout

* fix fieldName check

js/utils/isInDisplayBounds.js

@@ -0,0 +1,29 @@
+'use strict'
+
+const electron = require('electron');
+
+/**
+ * Returns true if given rectangle is contained within the workArea of at
+ * least one of the screens.
+ * @param  {x: Number, y: Number, width: Number, height: Number} rect
+ * @return {Boolean}      true if condition in desc is met.
+ */
+function isInDisplayBounds(rect) {
+    if (!rect) {
+        return false;
+    }
+    let displays = electron.screen.getAllDisplays();
+
+    for(let i = 0, len = displays.length; i < len; i++) {
+        let workArea = displays[i].workArea;
+        if (rect.x >= workArea.x && rect.y >= workArea.y &&
+            ((rect.x + rect.width) <= (workArea.x + workArea.width)) &&
+            ((rect.y + rect.height) <= (workArea.y + workArea.height))) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+module.exports = isInDisplayBounds;