Hide xml tree per config

[Silvenga]

Per #104 (comment)

This pull does the following:

• Creates a new configuration boolean option called xmlTools.treeViewEnabled which defaults at true.
• Hides the custom XML document view when this value is not false (incorrect values will default at true).

[pltrant]

Should be:

resourceLangId == 'xml' && config.xmlTools.treeViewEnabled != false

[Ilyes512]

YES, this is exactly what I was about to ask for in Issues :)

[masaeedu]

Hi @DotJoshJohnson. Anything blocking this PR from being merged?

[pltrant]

FYI, it was later discovered resourceLangId does not work in this context per microsoft/vscode#30981.

[julien-c]

Would love this as well.

[Silvenga]

I'm not sure if this pull request is required anymore since this feature was released -

[DotJoshJohnson]

All - This will be taken care of in the v2 release. The explorer will only display for XML files and you will also have the ability to disable the feature completely if desired.