Nvim: switch F6 to ClangdSwitchSourceHeader, update plugin configs

.config/nvim/after/plugin/nvim-tree.rc.vim

@@ -1,4 +1,3 @@
-let g:nvim_tree_indent_markers = 1 "0 by default, this option shows indent markers when folders are open
 let g:nvim_tree_git_hl = 1 "0 by default, will enable file highlight for git attributes (can be used without the icons).
 let g:nvim_tree_highlight_opened_files = 1 "0 by default, will enable folder and file icon highlight for opened files/directories.
 let g:nvim_tree_root_folder_modifier = ':~' "This is the default. See :help filename-modifiers for more options
@@ -137,5 +136,10 @@ require'nvim-tree'.setup {
       global = true,
     },
   },
+  renderer = {
+    indent_markers = {
+      enable = 1 -- this option shows indent markers when folders are open
+    }
+  },
 }
 EOF