Increase ItemList v_separation in editor theme

ItemList now uses the same value for v_separation as PopupMenu. This makes it easier to select items.

editor/editor_themes.cpp

@@ -1212,7 +1212,7 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	theme->set_color("font_color", "ItemList", font_color);
 	theme->set_color("font_selected_color", "ItemList", mono_color);
 	theme->set_color("guide_color", "ItemList", guide_color);
-	theme->set_constant("v_separation", "ItemList", widget_default_margin.y - EDSCALE);
+	theme->set_constant("v_separation", "ItemList", force_even_vsep * 0.5 * EDSCALE);
 	theme->set_constant("h_separation", "ItemList", 6 * EDSCALE);
 	theme->set_constant("icon_margin", "ItemList", 6 * EDSCALE);
 	theme->set_constant("line_separation", "ItemList", 3 * EDSCALE);