Add first pass at a tag manager

As independently suggested by @Skeeve and @Spangenhelm

core/ui/MoreSideBar/Tags.tid

@@ -2,6 +2,9 @@ title: $:/core/ui/MoreSideBar/Tags
 tags: $:/tags/MoreSideBar
 caption: {{$:/language/SideBar/Tags/Caption}}
 
+\define lingo-base() $:/language/SideBar/Tags/
+<$button to="$:/TagManager"><<lingo TagManager/Caption>></$button>
+
 <$list filter="[tags[]sort[title]]">
 
 <$transclude tiddler="$:/core/ui/TagTemplate"/> <small class="tw-menu-list-count"><$count filter="[is[current]tagging[]]"/></small>

core/ui/TagManager.tid

@@ -0,0 +1,16 @@
+title: $:/TagManager
+
+<table>
+<tbody>
+<tr>
+<th>Tag</th>
+<th>Colour</th>
+</tr>
+<$list filter="[tags[]sort[title]]">
+<tr>
+<td><$view field="title"/></td>
+<td><$edit-text field="color" tag="input" type="color"/></td>
+</tr>
+</$list>
+</tbody>
+</table>