DesignTime - Pages/Views: When adding existing pages to the project, they are overwritten without warning

Description of the behavior:
If existing pages/views are added to a project, they will be overwritten. There is no warning.
This affects the following elements:

Views:

• ErrorView
• LogInView
• LoadingView

• LoadingView
• RecipePage
• SettingsPage

• Diagnosis Page overwrites the DiagnosticsPage
• FunctionTreePage
• LogbookPage
• CurrentAlarmsPage
• LicenseManagerPage
• NetworkTreePage

Conditions under which the behavior occurs:

• The page/view listed above already exists in the project
• User adds the same element via the dialog "Add new element" dialog

Short-term measures, Recommendations, Rating:
n/a

[Automatic Translation]