Gui: Stop Revit rotation and zoom on scroll release

- Stops the rotation when scroll is released but SHIFT is still pressed
- Stops zooming when scroll is released but CTRL is still pressed

src/Gui/RevitNavigationStyle.cpp

@@ -256,8 +256,6 @@ SbBool RevitNavigationStyle::processSoEvent(const SoEvent * const ev)
             newmode = NavigationStyle::SELECTION;
         break;
     case BUTTON1DOWN|BUTTON2DOWN:
-        newmode = NavigationStyle::PANNING;
-        break;
     case BUTTON3DOWN:
         newmode = NavigationStyle::PANNING;
         break;
@@ -273,6 +271,13 @@ SbBool RevitNavigationStyle::processSoEvent(const SoEvent * const ev)
         break;
 
     default:
+        // Reset mode to SELECTION when button 3 is released
+        // This stops the DRAGGING when button 3 is released but SHIFT is still pressed
+        // This stops the ZOOMING when button 3 is released but CTRL is still pressed
+        if ((curmode == NavigationStyle::DRAGGING || curmode == NavigationStyle::ZOOMING)
+            && !this->button3down) {
+            newmode = NavigationStyle::SELECTION;
+        }
         break;
     }