MDL-77773 editor_tiny: Improve initial editor size

lib/editor/tiny/amd/src/editor.js

@@ -209,6 +209,13 @@ const getStandardConfig = (target, tinyMCE, options, plugins) => {
         // https://www.tiny.cloud/docs/tinymce/6/editor-important-options/#target
         target,
 
+        // https://www.tiny.cloud/docs/tinymce/6/customize-ui/#set-maximum-and-minimum-heights-and-widths
+        // Set the minimum height to the smallest height that we can fit the Menu bar, Tool bar, Status bar and the text area.
+        // eslint-disable-next-line camelcase
+        min_height: 175,
+        // Base the height on the size of the text area.
+        height: target.clientHeight,
+
         // Set the language.
         // https://www.tiny.cloud/docs/tinymce/6/ui-localization/#language
         // eslint-disable-next-line camelcase