Merge remote-tracking branch 'origin/gles3' into gles3-on-master

Various merge conflicts have been fixed manually and some mistakes
might have been made - time will tell :)

tools/editor/code_editor.cpp

@@ -895,7 +895,7 @@ void FindReplaceDialog::_bind_methods() {
 
 FindReplaceDialog::FindReplaceDialog() {
 
-	set_self_opacity(0.8);
+	set_self_modulate(Color(1,1,1,0.8));
 
 	VBoxContainer *vb = memnew( VBoxContainer );
 	add_child(vb);