chore(diagnostics): move updates to renderer (#1218)

should address #1216

lua/nvim-tree/renderer/init.lua

@@ -1,10 +1,12 @@
+local core = require "nvim-tree.core"
+local diagnostics = require "nvim-tree.diagnostics"
 local log = require "nvim-tree.log"
 local view = require "nvim-tree.view"
+
 local _padding = require "nvim-tree.renderer.components.padding"
 local icon_component = require "nvim-tree.renderer.components.icons"
 local help = require "nvim-tree.renderer.help"
 local git = require "nvim-tree.renderer.components.git"
-local core = require "nvim-tree.core"
 local Builder = require "nvim-tree.renderer.builder"
 
 local api = vim.api
@@ -92,6 +94,12 @@ function M.draw()
     api.nvim_win_set_cursor(view.get_winnr(), cursor)
   end
 
+  if view.is_help_ui() then
+    diagnostics.clear()
+  else
+    diagnostics.update()
+  end
+
   log.profile_end(ps, "draw")
 end