Fix folder import with domain containing special characters #6915
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Rationale
When a domain name ends with a dot (.) character, FiltUtil.makeLegalName would convert that . to _ when trying to match its import file during folder import. The conversion of dot to _ only happens when the dot is the last character in the filename. The logic is flawed in that it doesn't take into the ".tsv" suffix, which would mean the dot is in fact not the last character in the filename.
Related Pull Requests
Changes
FileUtil.makeLegalNameto get the correct file name.