Don't cache IHostApplication::getName()

As it turns out there are only two or three functions where we can do
this. It also breaks logging, and this function will probably only be
called once anyways. More consistency is always better.

src/plugin/bridges/vst3.h

@@ -23,8 +23,9 @@
 #include "../../common/logging/vst3.h"
 #include "common.h"
 
-// Forward declaration
+// Forward declarations
 class Vst3PluginProxyImpl;
+class YaPluginFactoryImpl;
 
 /**
  * This handles the communication between the native host and a VST3 plugin
@@ -134,7 +135,7 @@ class Vst3PluginBridge : PluginBridge<Vst3Sockets<std::jthread>> {
      *
      * @related get_plugin_factory
      */
-    YaPluginFactory* plugin_factory = nullptr;
+    YaPluginFactoryImpl* plugin_factory = nullptr;
 
    private:
     /**