Fixes to CIA building

1. Optimizes ticket finding
2. Fixes progress reporting overshoot
3. Use u64 for size in general
4. Various other fixes and cleanups

src/core/file_sys/certificate.cpp

@@ -97,7 +97,7 @@ static std::unordered_map<std::string, Certificate> g_certs;
 static bool g_is_loaded = false;
 
 bool Load(const std::string& path) {
-    g_certs.clear();
+    Clear();
 
     FileUtil::IOFile file(path, "rb");
     DataContainer container(file.GetData());
@@ -151,6 +151,11 @@ bool IsLoaded() {
     return g_is_loaded;
 }
 
+void Clear() {
+    g_is_loaded = false;
+    g_certs.clear();
+}
+
 const Certificate& Get(const std::string& name) {
     return g_certs.at(name);
 }