Disable optim. when recompressing clipboard PNG

Far too slow for big (10MB+) PNG

TODO.md

@@ -2,6 +2,7 @@
 
 - Image viewer: 
     - hflickable: support kinetic scrolling disabler 
+    - settings
 
 - compress png in a thread
 - verify upload cancellation

src/backend/matrix_client.py

@@ -598,7 +598,7 @@ class MatrixClient(nio.AsyncClient):
 
             async def get_path() -> Path:
                 with io.BytesIO(image) as inp, io.BytesIO() as buffer:
-                    PILImage.open(inp).save(buffer, "PNG", optimize=True)
+                    PILImage.open(inp).save(buffer, "PNG")
 
                     async with aiofiles.open(temp.name, "wb") as file:
                         await file.write(buffer.getvalue())