#8 Indent does not follow global tab settings

[Jari Pennanen]

Reproducing the bug:
1. Settings -> Preferences
2. Go to tab "Language Menu/Tab Settings"
3. Turn on "Replace by space"

4. Create new document.
5. Write "html:5" and expand, it still gives the content in hard coded one tab indentation.

Proposed fix:
1. When expanding snippet look for tab characters in beginning of lines.
2. Replace these tabs with appropriate global settings.
(This requires that all presaved snippets use Tab character as indentation)