update UI every 10 seconds instead of every second.
Remove Moq.
Fix issues with configurations.
Add AddImage, display it on add button.
Add image to Add MenuItem, resize images to 12x12.
Add DeleteImage.
Display DeleteImage on button and menuitem.
Add About, Save and Exit images, display them on controls.
Set AboutWindow icon.
Add remaining icons.
Add icon to Application Window.
Display all images, set image for MainWindow.
Replace old icon, properly use new one from resources. Remove useless resource string.
Improve AboutWIndow.
Add images to ApplicationWindow.
Merge branch 'feature/ui-improvements-fixes' into develop