Symbols font update (#2206)

* Very significant update to symbols font

- New Icomoon project and font files for 16px symbols;
- Symbol char codes now PUA and hexadecimal compliant;
- Symbols reorganized;
- New symbols added;
- Remove loading of legacy glyphs scss file;

* Added new fonts

- Updated Tabs View icon art;
- Generators icons added;

* Added new icon glyphs and background SVG art

- New icons for generators;
- New icon for Flexible Layout;
- New icon-grippy-ew, for Flexible Layout, others;

* Remove unused legacy font files

example/eventGenerator/bundle.js

@@ -49,7 +49,7 @@ define([
                 {
                     "key": "eventGenerator",
                     "name": "Event Message Generator",
-                    "cssClass": "icon-folder-new",
+                    "cssClass": "icon-generator-events",
                     "description": "For development use. Creates sample event message data that mimics a live data stream.",
                     "priority": 10,
                     "features": "creation",