gui: permanence of custom theme after changing TWRP folder

After changing the TWRP folder the custom theme was not being found because it was set in the code to the folder "TWRP/theme..."

This patch aims to fix that.

Signed-off-by: Fernando Oliveira <fernandoaju78@gmail.com>
Change-Id: I41e6e1378c74c9ee579b7b23beb37e0c2cd8761a
diff --git a/gui/gui.cpp b/gui/gui.cpp
index beed15e..ead50ce 100644
--- a/gui/gui.cpp
+++ b/gui/gui.cpp
@@ -816,7 +816,7 @@
 			}
 		}
 
-		theme_path += "/TWRP/theme/ui.zip";
+		theme_path += TWFunc::Check_For_TwrpFolder() + "/theme/ui.zip";
 		if (check || PageManager::LoadPackage("TWRP", theme_path, "main"))
 		{
 #endif // ifndef TW_OEM_BUILD
@@ -850,7 +850,7 @@
 	}
 
 	std::string theme_path = DataManager::GetSettingsStoragePath();
-	theme_path += "/TWRP/theme/ui.zip";
+	theme_path += TWFunc::Check_For_TwrpFolder() + "/theme/ui.zip";
 	// Check for a custom theme
 	if (TWFunc::Path_Exists(theme_path)) {
 		// There is a custom theme, try to load it