FindAdv: Amend ec387b6d: Handle search for '{' and '}'

FindAdv: Amend ec387b6d: Handle search for '{' and '}'

1) Take care of different input if changed the search-mode (with/without format)
	This amends ec387b6d
2) Make the braces used in text to be treated as single characters
	e.g. transform '\braceleft' to some unicode value
3) Try to use '$' as 'end of sequence' in regex
	We have to remove '}' and '\n' chars from the examined string