New neutral default theme

- desaturated UI elements to grey
- desaturated all near-white icons to grey
- changed some hardcoded colors

scene/resources/default_theme/default_theme.cpp

@@ -179,12 +179,12 @@ void make_default_theme() {
 
 	t->set_stylebox("panel","Panel", make_stylebox( panel_bg_png,0,0,0,0) );
 
-	Color control_font_color = Color::html("cfc9d5");
-	Color control_font_color_low = Color::html("bab4c1");
+	Color control_font_color = Color::html("d5d5d5");
+	Color control_font_color_low = Color::html("c1c1c1");
 	Color control_font_color_hover = Color::html("ffffff");
 	Color control_font_color_disabled = Color(0.9,0.9,0.9,0.6);
-	Color control_font_color_pressed = Color::html("bfb9c5");
-	Color font_color_selection = Color::html("715e7d");
+	Color control_font_color_pressed = Color::html("c5c5c5");
+	Color font_color_selection = Color::html("7d7d7d");
 	Ref<Texture> empty_icon = memnew( ImageTexture );
 
 	t->set_stylebox("normal","Button", make_stylebox( button_normal_png,5,5,5,5,8,3,8,4) );

tools/editor/editor_node.cpp

@@ -4088,9 +4088,9 @@ EditorNode::EditorNode() {
 
 	Globals::get_singleton()->set("debug/indicators_enabled",true);
 	Globals::get_singleton()->set("render/room_cull_enabled",false);
-	theme->set_color("prop_category","Editor",Color::hex(0x3f3945ff));
-	theme->set_color("prop_section","Editor",Color::hex(0x38323dff));
-	theme->set_color("prop_subsection","Editor",Color::hex(0x342e39ff));
+	theme->set_color("prop_category","Editor",Color::hex(0x454545ff));
+	theme->set_color("prop_section","Editor",Color::hex(0x3d3d3dff));
+	theme->set_color("prop_subsection","Editor",Color::hex(0x393939ff));
 	theme->set_color("fg_selected","Editor",Color::html("ffbd8e8e"));
 	theme->set_color("fg_error","Editor",Color::html("ffbd8e8e"));