Merge pull request #2 from schmunk42/master

fixed static calls
style nav-dots (bigger, color)
change default imagePresets
style backend
activate some effects
unset assetManager publish params (for prod system)
update crud placeholder
style view -> type hidden
style view slit
fix view slits
Update SlitSliderWidget.php

update import
added link to slit/view
Merge branch 'master' of https://github.com/Quexer69/yii-slit-slider
update style admin crud
fix js selection of slider types
style update
style update
validate link in image slit (check if external or internal link)
add editable fields du admin and view crud
change column sequence