LibCore: Put all classes in the Core namespace and remove the leading C

I've been wanting to do this for a long time. It's time we start being
consistent about how this stuff works.

The new convention is:

- "LibFoo" is a userspace library that provides the "Foo" namespace.

That's it :^) This was pretty tedious to convert and I didn't even
start on LibGUI yet. But it's coming up next.

1 files changed, 1 insertions, 1 deletions

diff --git a/Applications/HexEditor/HexEditor.cpp b/Applications/HexEditor/HexEditor.cpp
index 159edbe4bf..d5f3514ce2 100644
--- a/Applications/HexEditor/HexEditor.cpp
+++ b/Applications/HexEditor/HexEditor.cpp
@@ -564,7 +564,7 @@ void HexEditor::paint_event(GPaintEvent& event)
     }
 }
 
-void HexEditor::leave_event(CEvent&)
+void HexEditor::leave_event(Core::Event&)
 {
     ASSERT(window());
     window()->set_override_cursor(GStandardCursor::None);