Snippet dialog

1. The Snippet dialog is too small.
2. In Sublime Text 3, the default snippets(link for, fori, forp...) is packed in file.It's not a good idea.Because i want to modify these snippets.
3. If i write the special word(link dot) in the "tabTrigger", the snippet dialog is closed.
4. When the content what is in snippet dialog is focused on top, i type the up arrow and the snippet dialog is closed.This design is too bad.