Locale preferences: use B_WIDTH_FROM_WIDEST tabs.

The russian translation of "Formatting" does not fit in
B_WIDTH_AS_USUAL with the default font size.

src/preferences/locale/LocaleWindow.cpp

@@ -77,7 +77,7 @@ LocaleWindow::LocaleWindow()
 
 	float spacing = be_control_look->DefaultItemSpacing();
 
-	BTabView* tabView = new BTabView("tabview");
+	BTabView* tabView = new BTabView("tabview", B_WIDTH_FROM_WIDEST);
 	BGroupView* languageTab = new BGroupView(B_TRANSLATE("Language"),
 		B_HORIZONTAL, spacing);