* ThreeButtonDialog simplification step1: Help name. * ThreeButtonDialog simplification step2: Window title. * ThreeButtonDialog simplification step3: Removed class Details. * ThreeButtonDialog simplification step4: Removed unnecessary (and wrong) class. * ThreeButtonDialog simplification step5: Compacted TDButton constructors. * ThreeButtonDialog simplification step6: Removed purposeless methods. * ThreeButtonDialog simplification step7: Refactored constructor logic. * ThreeButtonDialog simplification step8: Icon normalisation. Signed-off-by: Konstantina Chremmou <konstantina.chremmou@citrix.com>