* Implement Save without re-prompt and Save as
Fixes #1668

* Add save-as icon

* Make .excalidraw the default extension

* Only show save as button on supporting browsers

Co-authored-by: Sanghyeon Lee <yongdamsh@gmail.com>

* store username for every room

* add missing fun

* add NonDeleted

* make test:all script run tests without prompt

* rename helper

* replace with helper

* make element contructors return nonDeleted elements

* cache filtered elements where appliacable for better perf

* rename manager element getter

* remove unnecessary assertion

* fix test

* make element types in resizeElement into nonDeleted

Co-authored-by: dwelle <luzar.david@gmail.com>

* add random usernames

* add username state

* add username input

* ability to set names

* fix tests

* set username oon mobile

* remove auto generated names

* remove commented code

* always string

* updaate snapshots

* maintain username when clearing canvas

* Update src/renderer/renderScene.ts

Co-Authored-By: Lipis <lipiridis@gmail.com>

* add border

* fix styles

Co-authored-by: Pete Hunt <petehunt@users.noreply.github.com>
Co-authored-by: Faustino Kialungila <faustino.kialungila@gmail.com>
Co-authored-by: Lipis <lipiridis@gmail.com>

* Add a icon for dulplication

* Add PanelComponent for duplication

* Add duplicate button for mobile

* Add styles for layout action buttons

* Add a translation for 'Actions'

* Show left action buttons only for desktop

* Add duplicate button at the bottom of mobile

It is provided depending on whether or not it is `multiElement` to maintain space between buttons.

* add loading state

* update snapshots

* add border radius

* fix comment breaking build jsx

* Bump prettier from 1.19.1 to 2.0.1

Bumps [prettier](https://github.com/prettier/prettier) from 1.19.1 to 2.0.1.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/1.19.1...2.0.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

* Update formatting

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: Panayiotis Lipiridis <lipiridis@gmail.com>

* Restyle the bottom bar on mobile as an Island

* Shorter label for collaboration button, truncate too-long button labels

* Refactor safe area things to global vars

* Fix scroll bar positioning, don’t block scrollbars with menu island

* Update text

* decrease gap between menu icons

* reduce margin of copy button

* add collaboratorsCount to roomDialog toggle button

* support ToolIcon className and fix label padding

* factor some ExportDialog classes out to Modal

* initial RoomDialog prototype

* change label for another-session button

* remove unused css

* add color comments

* Move the collaboration button to the main menu, add support for mobile

* remove button for creating another session

* add locks

* Fix alignment issue

* Reorder button

* reuse current scene for collab session

* keep collaboration state on restore

Co-authored-by: Jed Fox <git@twopointzero.us>

* Get rid of isSelected, canvas, canvasZoom, canvasOffsetX and canvasOffsetY on ExcalidrawElement.

* Fix most unit tests. Fix cmd a. Fix alt drag

* Focus on paste

* shift select should include previously selected items

* Fix last test

* Move this.shape out of ExcalidrawElement and into a WeakMap

* Initial factoring out of parts of the LayerUI component

2360 → 2224 LOC

* Create a Section component

* Break up src/index.tsx

* Refactor actions to reduce duplication, fix CSS

Also consolidate icons

* Move scene/data.ts to its own directory

* Fix accidental reverts, banish further single-character variables

* ACTIVE_ELEM_COLOR → ACTIVE_ELEMENT_COLOR

* Further refactoring the icons file

* Log all errors

* Pointer Event polyfill to make the tests work

* add test hooks & fix tests

Co-authored-by: dwelle <luzar.david@gmail.com>