Fix some localization issues in controls

Author: KoBeWi

scene/gui/color_mode.h

@@ -115,7 +115,7 @@ class ColorModeLinear : public ColorMode {
 	float slider_max[3] = { 1, 1, 1 };
 	Ref<GradientTexture2D> rgb_texture[3];
 
-	virtual String get_name() const override { return "Linear"; }
+	virtual String get_name() const override { return ETR("Linear"); }
 
 	virtual float get_slider_step() const override { return 0.001; }
 	virtual float get_spinbox_arrow_step() const override { return 0.01; }

scene/gui/file_dialog.cpp

@@ -2143,7 +2143,7 @@ FileDialog::FileDialog() {
 
 	favorite_button = memnew(Button);
 	favorite_button->set_theme_type_variation(SceneStringName(FlatButton));
-	favorite_button->set_tooltip_text(TTRC("(Un)favorite current folder."));
+	favorite_button->set_tooltip_text(ETR("(Un)favorite current folder."));
 	top_toolbar->add_child(favorite_button);
 	favorite_button->connect(SceneStringName(pressed), callable_mp(this, &FileDialog::_favorite_pressed));