fix #639 visual block mode minor issues (#640)
fix #639 visual block mode minor issues (#640)

* fix #639 visual block mode minor issues

* some additional visual block fixes

westim/Vim,Chillee/Vim,rufusroflpunch/Vim,Chillee/Vim,VSCodeVim/Vim,rufusroflpunch/Vim,westim/Vim,westim/Vim,Chillee/VSCodeNeovim,Chillee/VSCodeNeovim,VSCodeVim/Vim,Chillee/VSCodeNeovim