[Gui] Fix trailing whitespace and spelling issues

src/Gui/OverlayManager.h

@@ -21,7 +21,7 @@
  ****************************************************************************/
 
 #ifndef FC_OVERLAYMANAGER_H
-#define FC_OVERLAYMANAGER_H 
+#define FC_OVERLAYMANAGER_H
 
 #include <QObject>
 #include <FCGlobal.h>
@@ -62,7 +62,7 @@ public:
         ReloadResume = 2,
     };
     /** Set reload mode
-     * 
+     *
      * An internal timer is used to batch handle all relevant parameter
      * changes. The function is provided to let other code temporarily disable
      * the timer before changing the parameter, and then resume it after done.

src/Gui/TreeParams.py

@@ -66,7 +66,7 @@ Params = [
     ParamInt('FontSize', 0, on_change=True),
     ParamInt('ItemSpacing', 0, on_change=True),
     ParamHex('ItemBackground', 0, on_change=True, title='Item background color', proxy=ParamColor(),
-        doc = "Tree view item background. Only effecitve in overlay."),
+        doc = "Tree view item background. Only effective in overlay."),
     ParamInt('ItemBackgroundPadding', 0, on_change=True, title="Item background padding", proxy=ParamSpinBox(0, 100, 1),
         doc = "Tree view item background padding."),
     ParamBool('HideColumn', True, on_change=True, title="Hide extra column",