Bug 169694 [Preferences] EncodingFieldEditor.store() does not store correct value
3.3 M4 EncodingFieldEditor.store() does not store the correct value in the following scenario: 1. open with the default checked 2. select an encoding from the combo 3. call store() ==> the new value is not stored into the preference store. REASON: AbstractEncodingFieldEditor.updateEncodingState(boolean useDefault) misses the following call: setPresentsDefaultValue(useDefault);
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/dialogs/AbstractEncodingFieldEditor.java
* Returns the default encoding for the object being shown.
     * 
	 * @return the default encoding for the object being shown
	 */
	protected String findDefaultEncoding() {
		return WorkbenchEncoding.getWorkbenchDefaultEncoding();
	}
	/**
	 * Returns the text for the default encoding button.
     * 
	 * @return the text for the default encoding button 
	 */
	protected String defaultButtonText() {
		return NLS.bind(IDEWorkbenchMessages.WorkbenchPreference_defaultEncoding, defaultEnc);
	}
	/**
	 * Populates the encodings combo. Sets the text based on the
	 * selected encoding. If there is no selected encoding, the text is set to the default encoding.
     * 
	 * @param encodings the list of encodings (list of String)
	 * @param selectedEncoding the selected encoding, or <code>null</code>
	 */
	private void populateEncodingsCombo(List encodings, String selectedEncoding) {
		String[] encodingStrings = new String[encodings.size()];
		encodings.toArray(encodingStrings);
		encodingCombo.setItems(encodingStrings);
		if (selectedEncoding == null) {
			encodingCombo.setText(getDefaultEnc());
		} else {
			encodingCombo.setText(selectedEncoding);