small bug correction on testcase page.
Also simplify the creation script from empty test hidding useless fields.
Increment automatically the Step number to make it easier to understand.
Action mouseUp and mouseDown added #93
Merge origin/master

Conflicts:
	source/src/main/webapp/TestCase.jsp
TestCase.jsp merge correction
Modify Description length on invariant table to allow database updates
Remove color on step ID to avoid confusion