Merge pull request #560 from vaibhav-kaushal/alpha-3.0

Fixed syntax error in QRadioButton source code
Merge pull request #562 from vaibhav-kaushal/alpha-3.0

More documentation merged. Proceeding with more documentation.
Improving performance by eliminating unnecessary redraws. Makes sure that a value has changed before setting blnModified.
Merge pull request #563 from spekary/bugfix-UnnecessaryRedraws

bugfix-UnnecessaryRedraws