fix: add missing keymap description + handle nil descriptions in help window

Author: cbochs

lua/grapple/help_content.lua

@@ -76,7 +76,7 @@ function HelpContent:entities()
         ---@class grapple.help_content.entity
         local entity = {
             lhs = keymap.lhs,
-            desc = keymap.desc,
+            desc = keymap.desc or "",
             padding = 0,
         }
 

lua/grapple/settings.lua

@@ -330,7 +330,7 @@ local DEFAULT_SETTINGS = {
             local entry = window:current_entry()
             local id = entry.data.id
             window:perform_retain(ContainerActions.unload, { id = id })
-        end)
+        end, { desc = "Unload scope" })
 
         -- Reset
         window:map("n", "X", function()