Bug 99072 [preferences] Explain Ctrl modifier for code assistant
N20050608-0010 This was a polish item that we got to add. Easy fix. Approving for 3.1 RC2.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/CodeAssistConfigurationBlock.java
composite= createSubsection(control, PreferencesMessages.CodeAssistConfigurationBlock_autoactivationSection_title); 
		addAutoActivationSection(composite);
		
		initialize();
		
		scrolled.setContent(control);
		final Point size= control.computeSize(SWT.DEFAULT, SWT.DEFAULT);
		scrolled.setMinSize(size.x, size.y);
		return scrolled;
	}
	protected Composite createSubsection(Composite parent, String label) {
		Group group= new Group(parent, SWT.SHADOW_NONE);
		group.setText(label);
		GridData data= new GridData(SWT.FILL, SWT.CENTER, true, false);
		group.setLayoutData(data);
		GridLayout layout= new GridLayout();
		layout.numColumns= 3;
		group.setLayout(layout);
		return group;
	}
	private void addInsertionSection(Composite composite) {
		addCompletionRadioButtons(composite);
		
		String label;		
		label= PreferencesMessages.JavaEditorPreferencePage_insertSingleProposalsAutomatically;
		addCheckBox(composite, label, PREF_CODEASSIST_AUTOINSERT, trueFalse, 0);
		
		label= PreferencesMessages.JavaEditorPreferencePage_completePrefixes; 
		addCheckBox(composite, label, PREF_CODEASSIST_PREFIX_COMPLETION, trueFalse, 0);