Drop goffice dependency from our html engine

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22799 57a11ea4-9604-0410-9ed3-97b8803252fd
Charts: source formatting

- fix some whitespace
- improveformatting of resulting html

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22800 57a11ea4-9604-0410-9ed3-97b8803252fd
Charts: improve tooltips on line and bar charts

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22801 57a11ea4-9604-0410-9ed3-97b8803252fd