ui: usability fixes

* reduced mouse drag sensibility when clicking on graph nodes
* also edit search element when cursor in front and pressing DELETE
* scroll to up to minimized snippet after minimizing when scrolled down far

src/lib_gui/qt/graphics/component/QtGraphNodeComponentClickable.cpp

@@ -35,7 +35,7 @@ void QtGraphNodeComponentClickable::nodeMouseMoveEvent(QGraphicsSceneMouseEvent*
 {
 	Vec2i mousePos = Vec2i(event->scenePos().x(), event->scenePos().y());
 
-	if ((mousePos - m_mousePos).getLength() > 1.0f)
+	if ((mousePos - m_mousePos).getLength() > 3.0f)
 	{
 		m_mouseMoved = true;
 	}