Additionnal changes needed to remove sdt.editor from the play plugin

Play plugin PR: scala-ide/scala-ide-play2#225
The `goto 0` is at opcode 58.

```
private final boolean loop$1(org.eclipse.jface.text.TypedRegion, scala.collection.immutable.List);
    Code:
       0: aload_2       
       1: astore        4
       3: aload         4
       5: instanceof    #71                 // class scala/collection/immutable/$colon$colon
       8: ifeq          67
      11: aload         4
      13: checkcast     #71                 // class scala/collection/immutable/$colon$colon
      16: astore        5
      18: aload         5
      20: invokevirtual #75                 // Method scala/collection/immutable/$colon$colon.head:()Ljava/lang/Object;
      23: checkcast     #77                 // class org/eclipse/jface/text/TypedRegion
      26: astore        6
      28: aload         5
      30: invokevirtual #81                 // Method scala/collection/immutable/$colon$colon.tl$1:()Lscala/collection/immutable/List;
      33: astore        7
      35: aload         6
      37: invokevirtual #118                // Method org/eclipse/jface/text/TypedRegion.getOffset:()I
      40: aload_1       
      41: invokevirtual #118                // Method org/eclipse/jface/text/TypedRegion.getOffset:()I
      44: aload_1       
      45: invokevirtual #121                // Method org/eclipse/jface/text/TypedRegion.getLength:()I
      48: iadd          
      49: if_icmplt     61
      52: aload         6
      54: aload         7
      56: astore_2      
      57: astore_1      
      58: goto          0
      61: iconst_0      
      62: istore        8
      64: goto          81
      67: getstatic     #90                 // Field scala/collection/immutable/Nil$.MODULE$:Lscala/collection/immutable/Nil$;
      70: aload         4
      72: invokevirtual #94                 // Method java/lang/Object.equals:(Ljava/lang/Object;)Z
      75: ifeq          84
      78: iconst_1      
      79: istore        8
      81: iload         8
      83: ireturn       
      84: new           #96                 // class scala/MatchError
      87: dup           
      88: aload         4
      90: invokespecial #99                 // Method scala/MatchError."<init>":(Ljava/lang/Object;)V
      93: athrow        
```