Kit Manager: rename section to "Kits available on the computer"

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app_state.py

@@ -8,7 +8,7 @@ so later rebinding would only ever be seen by the module that did it.
 import configparser
 import os
 
-VERSION = "0.0.0.068"
+VERSION = "0.0.0.069"
 PROPERTIES_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)), "editor.properties")
 DEFAULT_GRID_SIZE = 10
 DEFAULT_ADD_TIMESTAMP = True

manage_kits.py

@@ -139,7 +139,7 @@ def collect_rows():
         ("Installed but not used kits", [
             (name, checksum) for name, checksum in declared if name not in required
         ]),
-        ("Kits to be installed", [(name, None) for name in others]),
+        ("Kits available on the computer", [(name, None) for name in others]),
     ]
 
     rows = []