(core) Add AddUser icon

Summary: Adding an icon to be used for the batch-add-users option in Manage Users dialog.

Test Plan: Checked manually

Reviewers: jarek

Reviewed By: jarek

Differential Revision: https://phab.getgrist.com/D3696

app/client/ui2018/IconList.ts

@@ -36,6 +36,7 @@ export type IconName = "ChartArea" |
   "GoogleLogo" |
   "GristLogo" |
   "ThumbPreview" |
+  "AddUser" |
   "BarcodeQR" |
   "BarcodeQR2" |
   "CenterAlign" |
@@ -165,6 +166,7 @@ export const IconList: IconName[] = ["ChartArea",
   "GoogleLogo",
   "GristLogo",
   "ThumbPreview",
+  "AddUser",
   "BarcodeQR",
   "BarcodeQR2",
   "CenterAlign",

static/ui-icons/UI/AddUser.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="16" width="16" viewBox="0 0 16 16"><title>add 29</title><g stroke-linejoin="round" class="nc-icon-wrapper" fill="none" stroke="#212121" stroke-linecap="round" stroke-width="1"><circle cx="7" cy="4" r="3.5" data-cap="butt"></circle><path d="M9.894 10A5.98 5.98 0 0 0 7.5 9.5h-1a6 6 0 0 0-6 6h9" data-cap="butt"></path><path data-cap="butt" stroke="#212121" d="M12.5 9.5v6"></path><path data-cap="butt" stroke="#212121" d="M9.5 12.5h6"></path></g></svg>