* include promise polyfill

* remove es6

* add viewBox to every icon

* change self closing to explicitly closing tags

* replace window.scroll.. with document.documentElement.scroll..

* verify document.activeElement.blur() is a function before calling

* fix visuals of color chooser (colorpicker still sometimes buggy)

* do not attach to mouseleave event in IE

* attempt removal with usecapture true in IE as well, this fixes the tool switching issue

* fix text tool for IE

* fix cursor for IE

* change curMode to boolean and rename to 'active'

* replace minified canvascolor with unminified code

* replace if else structure with switch statement

* compile polyfill for each browser individually

* remove static polyfills from board.js

* Fix broken js reference

* Fix unused variable and empty console log

* Allow serving non-minified polyfills for easier debugging

* Add proper caching for polyfill.js

This request is on the critical path, we should try to make it fast

* Include more polyfills

All the DOM polyfills were missing

* Update dependencies

* Add missing polyfill

Our custom polyfill was deleted, but the one from polyfill-library hadn't been added

* Remove feature detection for Node.contains

We now have the function in the polyfills

* Update polyfill caching logic

* Remove content-Length header

Co-authored-by: @lovasoa

* Add oneTouch option when creating tool. These tools won't be selected, rather their onstart action will be executed once.

Useful for undo/redo/clear/upload/zoom-in/zoom-out

* added grid

* move pattern to dedicated file

* Reformat code in grid tool

* Restore the gradient over the active tool

* Remove some duplicated code in oneTouch handling

Co-authored-by: Robert Beach <rdbeach@gmail.com>
Co-authored-by: Ophir LOJKINE <pere.jobs@gmail.com>

* add option to change pen size with the scroll wheel

* Update the cursor size immediately when changing the size

* Add a tooltip with the size change shortcut

Co-authored-by: ophir <pere.jobs@gmail.com>

* Added cursors

* Prepare cursor code for future settings to toggle cursors on or off.
Let cursor be the color the person has currently selected

* fix cursor on mobile (still won't display it in most cases as there is no hover on mobile but at least it won't throw errors)

* use correct size for cursor

* throttle cursor update rate to dramatically improve performance by eliminating congestion

* fix remote cursor size on desktop

* show own cursor by default and renove offset

* use svg as mouse cursor for pencil to be able to apply a reduced opacity to it and view our cursor

* don't throttle local cursor

* throttle local cursor at an independent higher rate. This could be made user adjustable for low power devices

* remove let and const from client-side code

* get emit count and emit count period from configuration

* reduce network cursor updates a lot to prevent instantly getting banned with the current defaults

* prevent eraser from deleting cursors

* use group inside of svg as drawing area and only delete elements inside it with the eraser

* use transform: translate to move cursors around instead of manipulating x and y directly

* fix: add socket ids to cursor messages

* fix incorrect remote cursor scaling and make local cursor visible again after it has been moved after being hidden due to inactivity

* create cursors in a proper fashion and keep them in a separate group

* scaling has been fixed in a1a5580

* move duplicated cursor creation code to function

* show cursors above content

* pass some of ther server configuration through to the client

* fix bug introduced in a833ce9

* allocate at most half of the allowed traffic to cursor updates

* remove debugging leftover

* use feature detection instead of ua sniffing

Co-Authored-By: Ophir LOJKINE <ophir.lojkine@auto-grid.com>

* fix regression where local cursor color was not updated on color change

* Define the cursor as a tool

* Remove the cursor tool from the UI

* Throttle remote cursor updates, not local ones

* Do not increment notification count on cursor move

* Use only one pencil icon

Use the same image for the pencil icon in the menu
and the pencil cursor that appears while drawing

* Add a test for the new cursor feature

* only stop drawing remote cursor when using some tools and always draw local cursor

* increase idle period before hiding cursor

* change idle duration back and set whether a cursor should be sent when using a tool in the respective tool

Co-authored-by: Robert Beach <rdbeach@gmail.com>
Co-authored-by: Ophir LOJKINE <ophir.lojkine@auto-grid.com>
Co-authored-by: ophir <pere.jobs@gmail.com>