Visual refresh happens on source tab(when refresh on change enabled)

fixed
small source cleanup
JBIDE-17614 VPE: Disabling inputs
JBIDE-17454 NPE when clicking on element in VPE visual part

handled
JBIDE-17262 Visual Preview Throws socket exceptions on visual part resize
JBIDE-17654 Various issues with source/editor navigation on linux

fixed
JBIDE-17450 Drag&Drop of image to VPE source part doesn't insert proper link
Adding missing $NON-NLS-1$
404 not found in VPE / HTML preview for pages with space

fixed