It's redundant to press Next button first after cancelling installation during show details installing process

Steps:
1. Double click the install package->Setup - Qt SDK page displays
2. Press 'Next'-> 'Installation Folder' page displays
3. Press 'Next'-> 'License Agreement' page displays
4. Accept the License Agreement and press Next->'Start Menu shortcuts' page displays
5. Press 'Next'-> 'Ready to Install' page displays
6. Press 'Install'-> 'Installing Qt SDK' page displays
7. Click 'Show Details' button to show installation details
8. Press 'Cancel' button to cancel installation-> Warning 'Do you want to abort the installation process' displays
9. Select 'Yes'->error

Actual Result: Next button is available. Need to press Next button first then the Qt SDK Setup Wizard failed page displays and able to click the Finish button to cancel installation successfully.

Expected Result: The Qt SDK Setup Wizard failed page appears after selecting 'Yes'. It's redundant that need to press 'Next' first then 'Finish'.

Comments: If cancel installation when the installation details is hide, the last page 'The Qt SDK Setup Wizard failed' will appear and no need to press Next button first.The install package is 'Qt_SDK_Win_offline_v1_1_beta_en.exe'.