Revert "Display::load: avoid premature enabling"

Some displays, e.g. RobotModelDisplay, rely on the fact that the display is enabled
before loading of its parameters.

This reverts commit 0969fef.

src/rviz/display_group.cpp

@@ -107,8 +107,6 @@ void DisplayGroup::load( const Config& config )
     Config display_config = it->second;
     Display* disp = it->first;
     disp->initialize( context_ );
-    // avoid premature enabling of the display from "Value" instead of from "Enabled"
-    display_config.mapSetValue("Value", disp->isEnabled());
     disp->load( display_config );
   }
 

src/rviz/properties/property.cpp

@@ -427,7 +427,7 @@ void Property::load( const Config& config )
   else if( config.getType() == Config::Map )
   {
     // A special map entry named "Value" means the value of this property, not a child.
-    // (If child "Value" does not exist, loadValue() will do nothing.)
+    // (If child "Value"does not exist, loadValue() will do nothing.)
     loadValue( config.mapGetChild( "Value" ));
 
     // Loop over all child Properties.