Bug 29755 Attach source does not allow one to select a folder... [build path]
When opening some .class that does not yet have a source attachment eclipse shows a text version of the interface defintion and a button for Attaching source. When pressing this button a window appaer where one can enter the name/location of a folder, zip or jar for the source. There are also a button for choosing it via a file selection dialog and this works fine for zip and jar files - but not for selecting a directory :( Workaround is just to enter the directory manually.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceAttachmentBlock.java
*/
	public Control createControl(Composite parent) {
		PixelConverter converter= new PixelConverter(parent);
		
		fSWTWidget= parent;
		
		Composite composite= new Composite(parent, SWT.NONE);	
		
		GridLayout layout= new GridLayout();
		layout.marginHeight= 0;
		layout.marginWidth= 0;
		layout.numColumns= 4;		
		composite.setLayout(layout);
		
		int widthHint= converter.convertWidthInCharsToPixels(isVariableEntry() ? 50 : 60);
		
		
		GridData gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
		gd.horizontalSpan= 4;
		
		Label message= new Label(composite, SWT.LEFT);
		message.setLayoutData(gd);
		message.setText(NewWizardMessages.getFormattedString("SourceAttachmentBlock.message", fEntry.getPath().lastSegment())); 
				
		if (isVariableEntry()) {
			DialogField.createEmptySpace(composite, 1);
			gd= new GridData(GridData.HORIZONTAL_ALIGN_FILL);
			gd.widthHint= widthHint;
			gd.horizontalSpan= 2;
			Label desc= new Label(composite, SWT.LEFT + SWT.WRAP);