[widget_filelog.js] code fixes ; new attributes
[widget_filelog.js] code fixes ; new attributes

- new attribute data-newest-first
- new value 'today' for attribute data-ago
- removed class 'events' (maybe paste and copy error in initial widget release)
- new auto-class 'filelog-lines' (valid for html-tag - surrounding all the log lines)
- new auto-class 'filelog-line' (valid for html-tag - surrounding one log line)
knowthelist/fhem-tablet-ui,knowthelist/fhem-tablet-ui,knowthelist/fhem-tablet-ui,knowthelist/fhem-tablet-ui,knowthelist/fhem-tablet-ui