PlatformUnitGuiPlugin: platform now stop moving when nibble is released.

	movement ctrl now has 5 instead of 2 levels

source/RobotAPI/gui_plugins/PlatformUnitPlugin/PlatformUnitGuiPlugin.cpp

@@ -36,7 +36,7 @@ PlatformUnitWidget::PlatformUnitWidget() :
     //init joystick controls
     std::unique_ptr<JoystickControlWidget> speed{new JoystickControlWidget{}};
     speedCtrl = speed.get();
-    speedCtrl->setSteps(2);
+    speedCtrl->setSteps(5);
     //use upper semicircle for rotation
     std::unique_ptr<JoystickControlWidget> rotat{new JoystickControlWidget{false}};
     rotaCtrl = rotat.get();
@@ -141,7 +141,9 @@ void PlatformUnitWidget::reportPlatformVelocity(::Ice::Float currentPlatformVelo
 
 void PlatformUnitWidget::stopPlatform()
 {
-    platformUnitProxy->moveRelative(0, 0, 0, 0, 0);
+    ::Ice::Float posAcc = 10.0f;
+    ::Ice::Float rotAcc = 0.1f;
+    platformUnitProxy->moveRelative(0, 0, 0, posAcc, rotAcc);
 }
 
 void PlatformUnitWidget::controlTimerTick()