Fix and enhance italian translation (#7173)

* Fixed and enhanced italian translation

* Fixed and enhanced italian translation

* Delete type: text/vnd.tiddlywiki

* Delete type: text/vnd.tiddlywiki

* Update and rename application%2Fjavascript.tid to application_javascript.tid

* Update and rename application%2Fjson.tid to application_json.tid

* Update and rename application%2Fx-tiddler-dictionary.tid to application_x_tiddler_dictionary.tid

* Update and rename image%2Fgif.tid to image_gif.tid

* Update and rename image%2Fjpeg.tid to image_jpeg.tid

* Update and rename image%2Fpng.tid to image_png.tid

* Update and rename image%2Fsvg%2Bxml.tid to image_svg_xml.tid

* Update and rename image%2Fx-icon.tid to image_x-icon.tid

* Update and rename text%2Fcss.tid to text_css.tid

* Update and rename text%2Fhtml.tid to text_html.tid

* Update and rename text%2Fplain.tid to text_plain.tid

* Update and rename text%2Fvnd.tiddlywiki.tid to text_vnd.tiddlywiki.tid

* Update and rename text%2Fx-tiddlywiki.tid to text_x-tiddlywiki.tid

* Fixed and enhanced italian translation

* Fixed and enhanced italian translation

* Changed en-GB to ''en-GB''

* Fixed and enhanced italian translation

* Fixed and enhanced italian translation

* Fixed and enhanced italian translation

* Fixed and enhanced italian translation

* Update NewJournal.multids

* Create NewJournalTags.tid

* Delete Advanced/Matches

* Update SideBar.multids

* Fixed and enhanced italian translation

* Fixed and enhanced italian translation

languages/it-IT/SideBar.multids

@@ -4,6 +4,7 @@ All/Caption: Tutti
 Caption: Barra laterale
 Contents/Caption: Indice
 Drafts/Caption: Bozze
+Explorer/Caption: Explorer
 Missing/Caption: Mancanti
 More/Caption: Altro
 Open/Caption: Aperti