Added expand code block option

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

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

@@ -46,6 +46,7 @@ export default class PreferencesUserSettingsTab extends React.Component {
         'alwaysShowTimestamps',
         'showRedactions',
         'enableSyntaxHighlightLanguageDetection',
+        'expandCodeByDefault',
         'showJoinLeaves',
         'showAvatarChanges',
         'showDisplaynameChanges',

src/settings/Settings.ts

@@ -300,6 +300,11 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         displayName: _td('Enable automatic language detection for syntax highlighting'),
         default: false,
     },
+    "expandCodeByDefault": {
+        supportedLevels: LEVELS_ACCOUNT_SETTINGS,
+        displayName: _td('Expand code blocks by default'),
+        default: false,
+    },
     "Pill.shouldShowPillAvatar": {
         supportedLevels: LEVELS_ACCOUNT_SETTINGS,
         displayName: _td('Show avatars in user and room mentions'),