Fix for different per-monitor scaling (#657)

* Use DPIAware::DEFAULT_DPI

* Make runner DPI-unaware, since it doesn't need to use a Per Monitor V2 DPI.

* Programmatically enable "Per Monitor V2 DPI" for the runner proccess and use a separate DPI-unaware thread for the corresponding API calls

* Increase PCH memory limit for settings project

* Address review issues

* Draw zoneWindows properly scaled

src/common/on_thread_executor.cpp

@@ -0,0 +1,38 @@
+#include "pch.h"
+
+#include "on_thread_executor.h"
+
+OnThreadExecutor::OnThreadExecutor()
+  :_worker_thread{[this]() { worker_thread(); }}
+{}
+
+std::future<void> OnThreadExecutor::submit(task_t task) {
+  auto future = task.get_future();
+  std::lock_guard lock{_task_mutex};
+  _task_queue.emplace(std::move(task));
+  _task_cv.notify_one();
+  return future;
+}
+
+void OnThreadExecutor::worker_thread() {
+  while(_active) {
+    task_t task;
+    {
+      std::unique_lock task_lock{_task_mutex};
+      _task_cv.wait(task_lock, [this] { return !_task_queue.empty() || !_active; });
+      if(!_active) {
+        break;
+      }
+      task = std::move(_task_queue.front());
+      _task_queue.pop();
+    }
+    task();
+  }
+}
+
+OnThreadExecutor::~OnThreadExecutor() {
+  _active = false;
+  _task_cv.notify_one();
+  _worker_thread.join();
+}
+