AIS_TextLabel - new public class to display simple text labels (based on MyTextClass private class from Draw Harness).
ViewerTest::Display() - add more reliable replacement for VDisplayAISObject() with no viewer update flag.
vdrawtext command redesign:
- Use new AIS_TextLabel class instead of private MyTextClass.
- Take object name and allow to clear labels from the Viewer.
- Use parameter name + parameter value syntax instead of strict list of mandatory arguments.
- Use [0; 1] range for colors and accept names.
- Drop redundant argument "isMultiByte".
- Support argument -noupdate to skip Viewer update.
Update test cases to new syntax of vdrawtext.
bugs/modalg_4/bug8842_7 - test stable OK (removed TODOs).
bugs/modalg_2/bug453_2 - added ?TODO according to unstable behavior (#25918)
bugs/moddata_1/bug22759 - updated reference data
bugs/vis/bug21091_4 bug21091_5 bug21091_6 bug21091_9 - updated reference data
sewing/tol_100/K1 - added ?TODO according to unstable behavior (test will be removed in #25471)
Unstable test cases were reviewed
Modified test cases using checktrend command
Modified test cases for Linux platform
Modified test cases for Debug mode
