Fix "jk" experimental feature for projectile find find using ido
Revert ahs binding on `<SPC> t h`

ahs = auto-highlight-symbol
Add smooth scrolling mode
Add variable `dotspacemacs-smooth-scrolling` to enable smooth-scrolling
Use smooth-scrolling package
Remove temporary hack for evil-search-highlight-persist

Fix is now upstream and available in MELPA
Fix counter when installing package
Remove deprecated comment
Merge branch 'develop' (v0.13.0)