related to #18216

Fixes #18197

**Bug**
Autolinks that start a line in markdown are currently parsed as as html content

**Fix**
Restrict the html element parser a little more so that we don't match tags html tags that look like `<scheme:...>`

fixes #18154

#18148

Fixes #18127

Show error messages if the workspace or user settings update fails

**Bug**
TS 2.2 includes a number of new code actions, such as implementing missing interface methods on classes. TS returns these in unedited form, so we have to format the document after applying these fixes. This formatting is not always correct using the current logic.

**Fix**
Try to determine the range to format using the set of text edits that TS returns to us. This is not perfect, but it should better match the actual edit that we make using the quick action

This allows shift+click/middle+click/num+super Windows and Unity shortcuts to
work as expected while not changing regular launch behavior.

Part of #48

#14464 Preserve editor size when switching layout

Fixes #18159

fixes #18148

fixes #18113

Fixes #18069

**Bug**
Script and style blocks inside markdown cannot contain blank lines

**fix**
Add a specific rule for script, style, and pre blocks according to the common mark spec: http://spec.commonmark.org/0.27/#html-block

fixes #18017

Add F4 shortcut for navigating search results

Improve edit action and search in Settings editor