Bug 47208 Generate Javadoc dialog lays out too wide [javadoc]
If one uses a custom doclet and sets the doclet class path to a long path (e.g. with many JAR files on it), the "Generate Javadoc" dialog lays out to try and fit the full doclet class path on the screen; this results in a very wide dialog.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocWizardPage.java
protected JavadocWizardPage(String pageName) {
		super(pageName);
		setTitle(JavadocExportMessages.getString("JavadocWizardPage.javadocwizardpage.description")); 
	}
	protected Button createButton(Composite composite, int style, String message, GridData gd) {
		Button button= new Button(composite, style);
		button.setText(message);
		button.setLayoutData(gd);
		return button;
	}
	protected GridLayout createGridLayout(int columns) {
		GridLayout gl= new GridLayout();
		gl.numColumns= columns;
		return gl;
	}