Custom tags editor to block removal of specific tags

[Charlie Veniot]

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In BASIC Anywhere Machine, I'm adding a tags editor to the "Program Properties" tiddler.

The "BAM" tag is a system tag, and I do not want BAM users removing that tag from "system" programs (these are BASIC libraries of code that are BAM components).

So I need a custom tags editor.

Because I do not like editing core tiddlers, I cloned the ```$:/core/ui/EditTemplate/tags``` tiddler, saving the clone as "BAM Tagging Tool".

In the code, I changed the following in the "tag-body-inner" macro:

From:

```<$button class="tc-btn-invisible tc-remove-tag-button" style=<<tag-styles>>><$action-listops $tiddler=<<saveTiddler>> $field=<<__tagField__>> $subfilter="-[{!!title}]"/>{{$:/core/images/close-button}}</$button>```

To:

```<$button disabled={{{ [<currentTiddler>match[BAM]then[yes]] }}} class="tc-btn-invisible tc-remove-tag-button" style=<<tag-styles>>><$action-listops $tiddler=<<saveTiddler>> $field=<<__tagField__>> $subfilter="-[{!!title}]"/>{{$:/core/images/close-button}}</$button>```

In the "Program Properties" tiddler, I added the following line:  

```{{ || BAM Tagging Tool }}```