(GH-453) Fix dialogs blocking title bar.
(GH-453) Fix dialogs blocking title bar.

Closes #453;

TODO: Make settings unactionable during an activate dialog.
chocolatey/ChocolateyGUI,chocolatey/ChocolateyGUI,gep13/ChocolateyGUI,chocolatey/ChocolateyGUI,chocolatey/ChocolateyGUI,chocolatey/ChocolateyGUI,digital-carver/ChocolateyGUI,gep13/ChocolateyGUI,gep13/ChocolateyGUI,gep13/ChocolateyGUI,gep13/ChocolateyGUI