[TxMt] Save Dialogue: File Extension Highlighted

Hi,

When I try saving a file, the save dialogue appears, whose name field is, let's say, "untitled.html". In this case, all the letters including html are highlighted.

It'd be useful if only "untitled" is highlighted so that, when user starts to type in file name, the extension is untouched. In this way, users can save a few letters of typing (e.g., html, js, sql, rb, m). I understand, in some cases, extensions can be different than by default (e.g., both html and htm are okay for HTML documents).

But, personally, in most cases, I'm OK with default extensions. Does anybody have any thoughts on this?

Takaaki