Remove "org_" prefix from list_allow_alphabetical.

These settings are exclusively for parsing org-mode so the prefix is redundant.

src/context/global_settings.rs

@@ -16,7 +16,7 @@ pub struct GlobalSettings<'g, 's> {
     /// Set to true to allow for plain lists using single letters as the bullet in the same way that numbers are used.
     ///
     /// Corresponds to the org-list-allow-alphabetical elisp variable.
-    pub org_list_allow_alphabetical: bool,
+    pub list_allow_alphabetical: bool,
 
     /// How many spaces a tab should be equal to.
     ///
@@ -38,7 +38,7 @@ impl<'g, 's> GlobalSettings<'g, 's> {
             },
             in_progress_todo_keywords: BTreeSet::new(),
             complete_todo_keywords: BTreeSet::new(),
-            org_list_allow_alphabetical: false,
+            list_allow_alphabetical: false,
             tab_width: 8,
             odd_levels_only: HeadlineLevelFilter::OddEven,
         }