Make master preview have a default position similar to the blackboard

com.unity.shadergraph/Editor/Resources/Styles/MasterPreviewView.uss

 MasterPreviewView {
     flex-direction: column;
     position-type: absolute;
-    position-right: 0;
-    position-bottom: 0;
+    position-right: 10;
+    position-bottom: 10;
-    min-width: 200;
-    min-height: 200;
     border-radius: 6;
     border-top-width: 1;
     border-bottom-width: 1;
-
 }
 
 MasterPreviewView > #top {