ui: fix --list-inactive to show all inactive jobs

The default "limit=5" ended up applying to the "list inactive" call to getDbSorted()
ever since 016cafd (version 2.6.0).

Explicitly pass in limit=None to avoid this problem and continue so show all of the
inactive job entries.

jobrunner/db/__init__.py

@@ -455,7 +455,7 @@ def listActive(self, thisWs, pane, useCp, includeReminders, keysOnly=False):
             includeReminders=includeReminders,
             keysOnly=keysOnly)
 
-    def listInactive(self, thisWs, pane, useCp, limit=5):
+    def listInactive(self, thisWs, pane, useCp, limit: Optional[int] = 5):
         self.listDb(
             self.inactive,
             limit,

jobrunner/main.py

@@ -443,7 +443,11 @@ def handleNonExecOptions(options: argparse.Namespace, jobs: JobsBase):
             sprint("Saved output to", fName)
         return True
     elif options.list_inactive:
-        jobs.listInactive(options.tw, options.tp, options.since_checkpoint)
+        jobs.listInactive(
+            options.tw,
+            options.tp,
+            options.since_checkpoint,
+            limit=None)
         return True
     elif options.count:
         sprint(jobs.countInactive())