* Allow tabs to wrap to multi-line

* Address feedback

* Add hidden space after last tab

* some polish for multi-line wrap css class

* some more polish

* Address feedback

* some adjustments to move forward

* add clarifying comment to tabs layout

* Fix editor container height

* WIP - overflowing tabs

* fix getPreferredHeight()

* Fix editor drop target for multi-line tabs

* Add comments and remove !important

* fix dnd offset

* Rework layout algorithm

* Make layout return a Dimension

* WIP - set maxDimensions

* Layout multi-line tabs synchronously

* make sure dimensions are always defined and passed down to where needed

* Rework group.relayout and store lastComputedHeight

* fix breadcrumbs causing editor to disappear

* consolidate css rules

* rename setting

* simplify classes

* streamline relayout

* wrapTabs => experimentalWrapTabs

* tweak layout

* Limit wrapped tabs to 3 rows

* Only use flex-grow for `tabSizing: fit`

* fix scrollbar reveal to work properly

* tabs - get rid of sync layout

* WIP: Move editor actions to the bottom right

* some tweaks

* introduce css variable for margin-right trick

* add border to separate tabs when wrapping

* 💄

* rename setting

* 💄 layout method
Co-authored-by: NBenjamin Pasero <benjpas@microsoft.com>

* first cut

* editor title - remove closeAllEditors() method

* editors - do not talk about pinning in settings

* editors - wrap up sticky tabs

A number of styles were missing from various locations due to the changes to support multiple icon labels in 8bb358f2

This change replaces all instances of the old class name .monaco-icon-label-description-container with the selector .monaco-icon-label-container > .monaco-icon-name-container

Replace layer hinting using `will-change: transform` with `transform: translate3d(0px, 0px, 0px)` (#84214)

* partially functioning grid view

* lots of toggling behavior and editor restore

* dimension changes

* restore layout and fix titlebar

* fix view dimensions on toggle/move

* increase timeout for debug config

* undo unnecessary changes to CSS

* put grid layout behind setting

* fix strict null checks

* address code comments from @bpasero

* changing key name

* Completely hide tab close button when dirty state is highlighted in top border

* Use :not selector to avoid code duplication

* put breadcrumbs on their own row

* fix bad wrapping in no-tabs case

* Theming for dirty tabs

* Improve border for dirty tabs
1. Make it thinner
2. Add a setting to disable it
3. Use 4 colors (activeFocused, activeUnfocused, inactiveFocused, inactiveUnfocused)
4. Move part of logic

* Hot apply of setting `dirtyTabBorder`

* Rename the setting

* Add default dirty border for all themes

* 3 of the 4 colors should be derived from the one main color

* Rename `dirty` to `modified`

* Rename `modifiedActiveFocusedBorder` to `modifiedBorder`

* Add modified border color for built-in themes

* More contrast

* Applying style directly on element

* Changing only color

* Using full border

* Using existing div for border styling

* Add setting to telemetry

* Uncomment cleanup code

* tweak colors and descriptions

* 💄