Don't replace ~ when we shouldn't

Don't replace ~ when we shouldn't

Bump glib req to 2.14 to get GRegex, now we only replace ~ with your
homedir in an action if it is (at the start of the string or preceded
by whitespace) and (at the end of the string or followed by (whitespace
or a slash)). (?:^|(?<=[ \t]))~(?=[/ \t$])

Fixes bug #4033.