Hide font scaling behind labs

src/components/views/settings/tabs/user/StyleUserSettingsTab.js

@@ -139,7 +139,7 @@ export default class StyleUserSettingsTab extends React.Component {
             <div className="mx_SettingsTab">
                 <div className="mx_SettingsTab_heading">{_t("Style")}</div>
                 {this._renderThemeSection()}
-                {this._renderFontSection()}
+                {SettingsStore.getValue("feature_font_scaling") ? this._renderFontSection() : null}
             </div>
         );
     }

src/i18n/strings/en_EN.json

@@ -2295,5 +2295,6 @@
     "Space": "Space",
     "End": "End",
     "Font size": "Font size",
+    "Font scaling": "Font scaling",
     "Style": "Style"
 }

src/settings/Settings.js

@@ -95,6 +95,12 @@ export const SETTINGS = {
     //     // not use this for new settings.
     //     invertedSettingName: "my-negative-setting",
     // },
+    "feature_font_scaling": {
+        isFeature: true,
+        displayName: _td("Font scaling"),
+        supportedLevels: LEVELS_FEATURE,
+        default: false
+    },
     "font_size": {
         displayName: _td("Font size"),
         supportedLevels: LEVELS_ACCOUNT_SETTINGS,