[Implemented] Improve code templates safety

[Lunasole]

As for me the code templates tool is one of really great and useful from those IDE built-in tools ^^

But currently code templates tool saves newly added (or modified) templates only on IDE quit.
Because of this I had several times loss of templates code -- they just didn't saved if IDE crashes, etc.

So it would be nice to write Templates.prefs file to a disk immediately after it was changed (or use delayed saving after it has changed, by timeout defined somewhere in IDE settings).