Editor: Cleanup some includes dependencies

Removes some unnecessary includes from `editor_node.h`, and instead add
those where they're used.

Removes unnecessary `editor_node.h` includes in various editor classes.

Renames `dynamicfont` to `dynamic_font` in a couple files.

Misc cleanup while jumping through that rabbit hole.

platform/javascript/export/export_plugin.cpp

@@ -31,7 +31,6 @@
 #include "export_plugin.h"
 
 #include "core/config/project_settings.h"
-#include "editor/editor_node.h"
 
 Error EditorExportPlatformJavaScript::_extract_template(const String &p_template, const String &p_dir, const String &p_name, bool pwa) {
 	FileAccess *src_f = nullptr;

platform/javascript/export/export_plugin.h

@@ -37,14 +37,13 @@
 #include "core/io/tcp_server.h"
 #include "core/io/zip_io.h"
 #include "editor/editor_export.h"
+#include "editor/editor_node.h"
 #include "main/splash.gen.h"
 #include "platform/javascript/logo.gen.h"
 #include "platform/javascript/run_icon.gen.h"
 
 #include "export_server.h"
 
-class EditorNode;
-
 class EditorExportPlatformJavaScript : public EditorExportPlatform {
 	GDCLASS(EditorExportPlatformJavaScript, EditorExportPlatform);
 

platform/javascript/export/export_server.h

@@ -36,7 +36,7 @@
 #include "core/io/tcp_server.h"
 #include "core/io/zip_io.h"
 #include "editor/editor_export.h"
-#include "editor/editor_node.h"
+#include "editor/editor_paths.h"
 
 class EditorHTTPServer : public RefCounted {
 private: