[FileLocksmith]Query system processes if elevated (#21688)

* [FileLocksmith]Query system processes if elevated

* Show warning if user is a system user

* Make text in the file list selectable

* Update src/modules/FileLocksmith/FileLocksmithLibInterop/NtdllExtensions.cpp

Co-authored-by: Andrey Nekrasov <yuyoyuppe@users.noreply.github.com>

* Trim \0 no longer required

* Correct elevation detection logic

* Use theme approppriate colors

Co-authored-by: Andrey Nekrasov <yuyoyuppe@users.noreply.github.com>

src/modules/FileLocksmith/FileLocksmithLibInterop/NtdllExtensions.h

@@ -29,6 +29,7 @@ public:
     {
         DWORD pid;
         std::wstring name;
+        std::wstring user;
         std::vector<std::wstring> modules;
     };
 
@@ -44,6 +45,9 @@ public:
 
     std::wstring path_to_kernel_name(LPCWSTR path);
 
+    // Gives the user name of the account running this process
+    std::wstring pid_to_user(DWORD pid);
+
     std::vector<HandleInfo> handles() noexcept;
 
     // Returns the list of all processes.