Partially revert of https://github.com/Prusa-Development/PrusaSlicerPrivate/commit/8e3a988b

This change was redundant, because switch to Manipulation panel is suppressed by disabling of Editors.
Moreover it did impossible to close all gizmos when it's really needed and caused a crash on "Select All" action, when some gizmo is open (SPE-1771)

src/slic3r/GUI/Gizmos/GLGizmosManager.cpp

@@ -173,8 +173,7 @@ void GLGizmosManager::reset_all_states()
     const EType current = get_current_type();
     if (current != Undefined)
         // close any open gizmo
-        if (!open_gizmo(current))
-            return;
+        open_gizmo(current);
 
     activate_gizmo(Undefined);
     m_hover = Undefined;