Condensing and tweaking code

0px becomes 0
Classes added for demoArrow, h2 and heading to save repeating styles
No need to set $class for 1 use, define inline and also shift left more
to line up better
Condense closing and opening PHP tags by not doing this
Add ternary condition instead of if else
Only trigger cssColorPreview if CSS is our caretLocType
Condense working out fileExt down to 1 line
Extra icons, tooltips and new tab is now a +

Help and Settings icons added
ICE symbol now clickable to website
All these icons now have alt and title tags
New tab symbol is now a + instead of a star
The form containing codeAssist and goLine now has an action of # to stop
submitting to self on some browsers
Adjustments to work with new icons

Added helpIcon and settingsIcon classes
newTab has slightly different padding now we have a + symbol instead of
a star image
Help & Settings icons added, new tab star gone