Refactor Tab completion for Twitch commands (#3144)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/controllers/commands/CommandController.hpp

@@ -23,11 +23,11 @@ class CommandModel;
 class CommandController final : public Singleton
 {
 public:
-    SignalVector<Command> items_;
+    SignalVector<Command> items;
 
     QString execCommand(const QString &text, std::shared_ptr<Channel> channel,
                         bool dryRun);
-    QStringList getDefaultTwitchCommandList();
+    QStringList getDefaultChatterinoCommandList();
 
     virtual void initialize(Settings &, Paths &paths) override;
     virtual void save() override;
@@ -61,7 +61,7 @@ private:
     std::unique_ptr<pajlada::Settings::Setting<std::vector<Command>>>
         commandsSetting_;
 
-    QStringList commandAutoCompletions_;
+    QStringList defaultChatterinoCommandAutoCompletions_;
 };
 
 }  // namespace chatterino