Expand Default Emojis (adding in Arrows, Shapes, and Brands) (#5147)

* Updating OpenMoji emojis and updating icon cache

* Updating Emoji and OpenShot language translation template POT (new emojis and some new translatable text)

* Fix emoji group filter bug - now we are saving the English group ID in the settings (when filtering emoji groups), instead of the translated group name. You can now filter to a group, change OpenShot's language, and re-launch with the correct filter chosen.

* Adding some additional emoji groups: social media brands, some additional arrows, ui elements, etc...

* Updating icon/thumbnail cache (2X and 1X)

* Updating translations template for the new emojis

* Updating openmoji metadata, and adding a few more emojis that were missing due to old metadata.

* Updating translations for a few new emojis

* Updating icon/thumbnail cache for new emojis

* Adding instructions to README.md for updating emojis in the future - so we make less mistakes

Author: jonoomph

src/emojis/README.md

@@ -72,3 +72,12 @@ Attribution suggestion:
 ² Code licensed under the GNU Lesser General Public License v3 ([LGPL-3.0](https://www.gnu.org/licenses/lgpl-3.0.en.html))
 
 [![License: LGPL-3.0](https://img.shields.io/badge/License-LGPL%20v3-lightgrey.svg)](https://www.gnu.org/licenses/lgpl-3.0.en.html)
+
+## Instructions for Updating OpenShot with latest OpenMoji release
+
+- Download latest OpenMoji release (**Source Zip**)
+- Extract the `data/openmoji.json` file to `src/emojis/data` (very important - so we have metadata on the newest emojis)
+- Extract the `color/svg` folder to `src/emojis/color/svg/` (clobber old OpenShot emojis)
+- Run `python3 src/emojis/optimize-emojis.py` (this will create a new openmoji-optimized.json file used at runtime, and will delete all unused emojis from OpenShot)
+- Rebuild the icon cache (`python3 images/generate_cache.py`)
+- Rebuild the language translation templates (`python3 src/language/generate_translations.py`)