refacto: move toggle help and filter toggles into actions

also fix explorer to properly remove element on update when filter is
applied

lua/nvim-tree/actions/toggle-ignore.lua

@@ -0,0 +1,15 @@
+local M = {}
+
+function M.ignored()
+  local config = require"nvim-tree.explorer.utils".config
+  config.filter_ignored = not config.filter_ignored
+  return require'nvim-tree.actions.reloaders'.reload_explorer()
+end
+
+function M.dotfiles()
+  local config = require"nvim-tree.explorer.utils".config
+  config.filter_dotfiles = not config.filter_dotfiles
+  return require'nvim-tree.actions.reloaders'.reload_explorer()
+end
+
+return M