Enable reactions and edits by default

This enables reactions and edits by default, assuming you don't have any local
device settings that would disable them.

Fixes https://github.com/vector-im/riot-web/issues/10281

src/settings/Settings.js

@@ -118,13 +118,13 @@ export const SETTINGS = {
         isFeature: true,
         displayName: _td("Edit messages after they have been sent (refresh to apply changes)"),
         supportedLevels: LEVELS_FEATURE,
-        default: false,
+        default: true,
     },
     "feature_reactions": {
         isFeature: true,
         displayName: _td("React to messages with emoji (refresh to apply changes)"),
         supportedLevels: LEVELS_FEATURE,
-        default: false,
+        default: true,
     },
     "MessageComposerInput.suggestEmoji": {
         supportedLevels: LEVELS_ACCOUNT_SETTINGS,