Hi Yutaka,
the “Select Snippet” function finds always too many for me.
May I suggest this improvements to you?
I imagine two new check boxes in the “Select Snippet” dialog:
[X] Search in Name field only
(Only take into account “Properties > General > Name” for search)
[X] From current configuration only
(Only search in Snippets folders with same name as current configuration name)
(OR better: limit search to folder with current focus?)