Merge pull request #434 from kyuri/upstream

Listview: tuned "PgUp"/"PgDown" scrolling; changed "hover" processing
Fixed JS error when there is no selection and key is pressed
Merge branch 'master' of https://github.com/vitmalina/w2ui
Fixed content render bug when grid is in the panel. It was causing flicks
Popup message now allows unlimited messages
Fixed tabs.right property to be able to change it runtime and call refresh()
Recompiled JS and CSS
Small fixes in grid
Small fixes in fields