Fix Illegible text in audio bus editor

This pull request fixes an issue with the audio bus editor where the text would be illegible regardless of the theme being used.

editor/editor_themes.cpp

@@ -1024,6 +1024,7 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	theme->set_stylebox("read_only", "LineEdit", style_line_edit_disabled);
 	theme->set_icon("clear", "LineEdit", theme->get_icon("GuiClose", "EditorIcons"));
 	theme->set_color("read_only", "LineEdit", font_disabled_color);
+	theme->set_color("font_uneditable_color", "LineEdit", font_disabled_color);
 	theme->set_color("font_color", "LineEdit", font_color);
 	theme->set_color("font_selected_color", "LineEdit", mono_color);
 	theme->set_color("caret_color", "LineEdit", font_color);
@@ -1189,7 +1190,7 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 	style_tooltip->set_default_margin(SIDE_TOP, default_margin_size * EDSCALE * 0.5);
 	style_tooltip->set_default_margin(SIDE_RIGHT, default_margin_size * EDSCALE);
 	style_tooltip->set_default_margin(SIDE_BOTTOM, default_margin_size * EDSCALE * 0.5);
-	style_tooltip->set_bg_color(mono_color.inverted() * Color(1, 1, 1, 0.8));
+	style_tooltip->set_bg_color(mono_color.inverted());
 	style_tooltip->set_border_width_all(0);
 	theme->set_color("font_color", "TooltipLabel", font_hover_color);
 	theme->set_color("font_color_shadow", "TooltipLabel", Color(0, 0, 0, 0));