Bug 85147 [Preferences] filter field: Looses focus on type
20050208 When you type in the filter field, the focus ofter switched to the tree. You have to give the filter field the focus again to continue typing
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
}
	/**
	 * Returns whether the current page is valid.
	 * 
	 * @return <code>false</code> if the current page is not valid, or or
	 *         <code>true</code> if the current page is valid or there is no
	 *         current page
	 */
	protected boolean isCurrentPageValid() {
		if (currentPage == null)
			return true;
		return currentPage.isValid();
	}
	/**
	 * @param control
	 *            the <code>Control</code> to lay out.
	 * @since 3.0
	 */
	protected void layoutTreeAreaControl(Control control) {
		GridData gd = new GridData(GridData.FILL_VERTICAL);
		gd.widthHint = getLastRightWidth();
		gd.verticalSpan = 1;
		control.setLayoutData(gd);
	}
	/**
	 * The preference dialog implementation of this <code>Dialog</code>
	 * framework method sends <code>performOk</code> to all pages of the
	 * preference dialog, then calls <code>handleSave</code> on this dialog to
	 * save any state, and then calls <code>close</code> to close this dialog.
	 */