umu_proton: fix bug when offline and finding latest proton

- In the case the user is offline and there exists both a GE-Proton9-10 and GE-Proton9-9, GE-Proton9-9 would be used which may downgrad the prefix if it was created using 9-10. This is because during the max function's comparison, the numeric parts of the strings would not be handled as expected. Moreover, the max function differs from sorted when determining the maximum value when the strings contain numeric parts such that sorted(foo)[0] != max(foo) where foo is an iterable containing string elements with numeric parts appended. To solve this, we need to specify a custom sort routine that handles the numeric parts

umu/umu_proton.py

@@ -5,6 +5,7 @@
 from http.client import HTTPException
 from json import loads
 from pathlib import Path
+from re import split as resplit
 from shutil import rmtree
 from ssl import SSLContext, create_default_context
 from tarfile import open as tar_open
@@ -257,11 +258,17 @@ def _get_from_steamcompat(
 
     try:
         latest: Path = max(
-            proton
-            for proton in steam_compat.glob("*")
-            if proton.name.startswith(version)
+            (
+                proton
+                for proton in steam_compat.glob("*")
+                if proton.name.startswith(version)
+            ),
+            key=lambda proton: [
+                int(text) if text.isdigit() else text.lower()
+                for text in resplit(r"(\d+)", proton.name)
+            ],
         )
-        log.console(f"{latest.name} found in: '{steam_compat}'")
+        log.console(f"{latest.name} found in '{steam_compat}'")
         log.console(f"Using {latest.name}")
         os.environ["PROTONPATH"] = str(latest)
         env["PROTONPATH"] = os.environ["PROTONPATH"]