Support importing marks with tags

[yasuokav]

Currently, I tried to import the HTML file exported from Unmark, but tags are not imported.

Exported file:

<!DOCTYPE NETSCAPE-Bookmark-file-1>
        <!-- This is an automatically generated file.
             It will be read and overwritten.
             DO NOT EDIT! -->
        <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
        <TITLE>Unmark Export</TITLE>
        <H1>Bookmarks</H1>

<DL>
<DT><A HREF="http://json.parser.online.fr/" ADD_DATE="1606156281" TAGS="work," >Json Parser Online</A>

</DL>

[cdevroe]

@yasuokav So are you importing into a browser? You said "import the HTML file exported from Unmark"? If you'd like to support tags, you should export into Unmark file and import from Unmark file.