Better look for exam mode that shows no solutions
Fix some CSS issues, move input field columns left, when there is no text in the first column
Fix bug in extractInput() that was magically handled in Firefox, but not in Safari
Fix encoding problem in method that uses shlex.

Apparently, the sqlite DB uses ISO-8859-1 encoding, not UTF-8, and certainly not ASCII
shlep seems to be unable to use unicode strings (still??!)
Fix bug that mistakenly changed segment types in the task builder.

Also added filter to transformFromMCE(), because not all textareas are tinyMCE editors, when they show normal text instead of source code. (input field and check box type segments, etc.)