Added Squire HTML editor as lightweight fast alternative solution for the heavy CKEditor

Some features are still missing (as i need to create own UI)
Enable in:
[labs]
use_squire_html_editor = On

dev/View/Popup/Compose.js

@@ -650,12 +650,8 @@ class ComposePopupView extends AbstractViewNext {
 				this.oEditor = new HtmlEditor(
 					this.composeEditorArea(),
 					null,
-					() => {
-						fOnInit(this.oEditor);
-					},
-					(bHtml) => {
-						this.isHtml(!!bHtml);
-					}
+					() => fOnInit(this.oEditor),
+					bHtml => this.isHtml(!!bHtml)
 				);
 				// }, 1000);
 			} else if (this.oEditor) {

dev/View/Popup/Template.js

@@ -107,12 +107,8 @@ class TemplatePopupView extends AbstractViewNext {
 		if (!this.editor && this.signatureDom()) {
 			this.editor = new HtmlEditor(
 				this.signatureDom(),
-				() => {
-					this.populateBodyFromEditor();
-				},
-				() => {
-					this.editor.setHtmlOrPlain(sBody);
-				}
+				() => this.populateBodyFromEditor(),
+				() => this.editor.setHtmlOrPlain(sBody)
 			);
 		} else {
 			this.editor.setHtmlOrPlain(sBody);