stats.lua: scroll keybindings while filtering them

console.lua binds up and down to navigate its history. Add a private
flag to mp.input.get to instruct console.lua not to bind up and down, so
you can use them to scroll the keybindings page while filtering
keybindings.

If it is requested, this can be replaced with an argument to input.get
to not bind arbitrary keys.

Fixes #14966.

player/lua/console.lua

@@ -93,6 +93,7 @@ local history_pos = 1
 local searching_history = false
 local log_buffers = {[id] = {}}
 local key_bindings = {}
+local dont_bind_up_down = false
 local global_margins = { t = 0, b = 0 }
 local input_caller
 
@@ -1624,11 +1625,13 @@ local function define_key_bindings()
         return
     end
     for _, bind in ipairs(get_bindings()) do
+        if not (dont_bind_up_down and (bind[1] == 'up' or bind[1] == 'down')) then
             -- Generate arbitrary name for removing the bindings later.
             local name = "_console_" .. (#key_bindings + 1)
             key_bindings[#key_bindings + 1] = name
             mp.add_forced_key_binding(bind[1], name, bind[2], {repeatable = true})
         end
+    end
     mp.add_forced_key_binding("any_unicode", "_console_text", text_input,
         {repeatable = true, complex = true})
     key_bindings[#key_bindings + 1] = "_console_text"
@@ -1675,6 +1678,7 @@ set_active = function (active)
             line = ''
             cursor = 1
             selectable_items = nil
+            dont_bind_up_down = false
         end
         collectgarbage()
     end
@@ -1734,6 +1738,7 @@ mp.register_script_message('get-input', function (script_name, args)
     line = args.default_text or ''
     cursor = args.cursor_position or line:len() + 1
     id = args.id or script_name .. prompt
+    dont_bind_up_down = args.dont_bind_up_down
     if histories[id] == nil then
         histories[id] = {}
         log_buffers[id] = {}

player/lua/stats.lua

@@ -1619,6 +1619,7 @@ local function filter_bindings()
                 end
             end
         end,
+        dont_bind_up_down = true,
     })
 end