Fix typo, add missing header, remove unecessary asserts

Signed-off-by: nggieber <52797929+AMZN-nggieber@users.noreply.github.com>

Code/Tools/ProjectManager/Source/Application.cpp

@@ -70,7 +70,7 @@ namespace O3DE::ProjectManager
         }
 
         m_pythonBindings = AZStd::make_unique<PythonBindings>(GetEngineRoot());
-        AZ_Assert(m_pythonBindings, "Failed to create PythonBindings");
+
         if (!m_pythonBindings->PythonStarted())
         {
             if (!interactive)
@@ -113,7 +113,6 @@ namespace O3DE::ProjectManager
         }
 
         m_settings = AZStd::make_unique<Settings>();
-        AZ_Assert(m_settings, "Failed to create Settings");
 
         if (!RegisterEngine(interactive))
         {

Code/Tools/ProjectManager/Source/GemCatalog/GemFilterWidget.cpp

@@ -7,6 +7,9 @@
  */
 
 #include <GemCatalog/GemFilterWidget.h>
+
+#include <AzCore/Math/MathUtils.h>
+
 #include <QButtonGroup>
 #include <QCheckBox>
 #include <QLabel>

Code/Tools/ProjectManager/Source/ProjectBuilderController.cpp

@@ -27,7 +27,7 @@ namespace O3DE::ProjectManager
         m_worker = new ProjectBuilderWorker(m_projectInfo);
         m_worker->moveToThread(&m_workerThread);
 
-        // Remove key here in case Project Manager crashing while building that causes HandleResults to not be called
+        // Remove key here in case Project Manager crashed while building because that causes HandleResults to not be called
         SettingsInterface::Get()->SetProjectBuiltSuccessfully(m_projectInfo, false);
 
         connect(&m_workerThread, &QThread::finished, m_worker, &ProjectBuilderWorker::deleteLater);