Remove flags in language plugins (#8837)

* Remove flags in language plugins

* Remove references to language icons

* Remove obsolete example

There are no incoming links to this tiddler

* Remove icon from en-GB language

* Temporarily add all the languages for testing

To be removed before merging

* Add new "language" icon

* Languageswitcher update

* Translator editon docs update

* Fixes for introduction edition

* Remove LanguageGallery in ja-JP edition

* Remove temporary setting

---------

Co-authored-by: Jeremy Ruston <jeremy@jermolene.com>

editions/introduction/tiddlers/slides/Translations.tid

@@ -1,33 +1,9 @@
 title: Translations
 
-\define flag-title()
-$(languagePluginTitle)$/icon
-\end
-
 TiddlyWiki is currently available in <$count filter="[[$:/languages/en-GB]] [plugin-type[language]sort[title]] -[[$:/languages/de-AT]]"/> languages:
 
-<div class="tc-drop-down-language-chooser" style="font-size: 7px; line-height: 8px; -moz-columns:6; -webkit-columns:6; columns:6;">
-<$list filter="[[$:/languages/en-GB]] [plugin-type[language]sort[title]] -[[$:/languages/de-AT]]">
-<div class="tc-language-list">
-<span class="tc-language-list-name tc-image-button">
-<$set name="languagePluginTitle" value=<<currentTiddler>>>
-<$transclude subtiddler=<<flag-title>>>
-<$list filter="[all[current]field:title[$:/languages/en-GB]]">
-<$transclude tiddler="$:/languages/en-GB/icon"/>
-</$list>
-</$transclude>
-</$set>
-<$view field="description">
-<$view field="name">
-<$view field="title"/>
-</$view>
-</$view>
-<$view subtiddler="$:/language/ControlPanel/Basics/Language/Prompt">
-<$view tiddler="$:/language/ControlPanel/Basics/Language/Prompt"/>
-</$view>
-</span>
-</div>
-</$list>
+<div style.height="400px" style.overflowY="auto">
+{{$:/snippets/languageswitcher}}
 </div>
 
 Find out how to [[Get Started]].

editions/introduction/tiddlywiki.info

@@ -25,6 +25,7 @@
 		"de-DE",
 		"el-GR",
 		"en-US",
+		"en-PH",
 		"es-ES",
 		"fa-IR",
 		"fr-FR",
@@ -34,12 +35,15 @@
 		"it-IT",
 		"ja-JP",
 		"ko-KR",
+		"mk-MK",
 		"nl-NL",
 		"pa-IN",
+		"pl-PL",
 		"pt-BR",
 		"pt-PT",
 		"ru-RU",
 		"sk-SK",
+		"sl-SI",
 		"sv-SE",
 		"zh-CN",
 		"zh-Hans",