vim: use <leader> for Intellij Vim plugin
vim: use <leader> for Intellij Vim plugin

The Intellij Vim plugin does not understand bindings that refer to
<localleader>, but it does understand <leader>.

We don't really use Vim much for heavy lifting anymore (it's been
several years now), so there's no danger of making Vim plugins unhappy.

listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg,listx/syscfg