nvim: ide-features added

- linting for shell and markdown
- rename function mapped to F5
- minor GTK changes

.config/gtk-2.0/gtkfilechooser.ini

@@ -1,9 +1,9 @@
 [Filechooser Settings]
-LocationMode=path-bar
+LocationMode=filename-entry
 ShowHidden=false
 ShowSizeColumn=true
-GeometryX=0
-GeometryY=0
+GeometryX=286
+GeometryY=86
 GeometryWidth=796
 GeometryHeight=596
 SortColumn=name