Workaround lualine forcing itself for cmdline mode

The CmdlineEnter event didn't seem to work here.
This fixes the last problem with lualine in this case (I am sure more
problems will arise sooner or later).

Also see 14cd2d4

Fixes #51

Author: vimpostor

autoload/tpipeline.vim

@@ -36,6 +36,7 @@ func tpipeline#build_hooks()
 			if g:tpipeline_clearstl
 				if tpipeline#util#is_lualine()
 					au OptionSet statusline if v:option_type == 'local' | call tpipeline#util#clear_all_stl() | endif
+					au ModeChanged *:c call tpipeline#util#clear_all_stl()
 				endif
 				au OptionSet statusline if v:option_type == 'global' | call tpipeline#util#clear_stl() | endif
 			endif