Update scene_composer.adoc

Fixed typo on image width.
Removed unnecessary list under saving scene.

src/docs/asciidoc/sdk/scene_composer.adoc

@@ -38,7 +38,7 @@ To create a blank scene file do the following:
 == Loading the scene
 
 
-image::sdk/jmonkeyplatform-docu-2.png[jmonkeyplatform-docu-2.png,with="421",height="298",align="right"]
+image::sdk/jmonkeyplatform-docu-2.png[jmonkeyplatform-docu-2.png,width="421",height="298",align="right"]
 
 
 To open a scene
@@ -103,4 +103,4 @@ Also note that although it its possible to directly link external model files (O
 
 == Saving the Scene
 
-.  When a scene has been changed, press the “save button in the main toolbar or press [Ctrl-S] / [Apple-S] to save it.
+When a scene has been changed, press the “save button in the main toolbar or press [Ctrl-S] / [Apple-S] to save it.