refact: do not depend on TM4E internal implementation

Author: rubenporras

org.eclipse.lsp4e/src/org/eclipse/lsp4e/operations/hover/FocusableBrowserInformationControl.java

@@ -24,6 +24,7 @@
 import org.eclipse.jface.util.Util;
 import org.eclipse.lsp4e.LSPEclipseUtils;
 import org.eclipse.lsp4e.LanguageServerPlugin;
+import org.eclipse.lsp4e.ui.UI;
 import org.eclipse.swt.browser.Browser;
 import org.eclipse.swt.browser.LocationEvent;
 import org.eclipse.swt.browser.LocationListener;
@@ -34,7 +35,6 @@
 import org.eclipse.swt.graphics.RGB;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Shell;
-import org.eclipse.tm4e.ui.internal.utils.UI;
 import org.eclipse.ui.editors.text.EditorsUI;
 import org.eclipse.ui.texteditor.AbstractDecoratedTextEditorPreferenceConstants;