Release v0.5.1-alpha.4

• Added: Alignments for elements refactored (Better detection if they run out of the workspace)
• Added: New element "ForeignObject" added. This allows normal HTML content inside the workspace.
• Added: Images can now have a shadow
• Added: Keyboard copy, paste and delete functions added (Strg/cmd + c and Strg/cmd + v, Entf/del)
• Added: Double-Click on element or line opens the 'extended'-tab and single click opens 'basic'-tab inside the configbar
• Added: The liveview can now be displayed in fullscreen via doubleclick oder double-tab
• Added: Better handling of images through datasources (image will be hidden, if datasource is empty)
• Added: Lines can now have frame options for opening URLs
• Added: Object-Browser scrolls the first clicked parent folder to the top
• FIX: Element with linebreak was not able to be moved after applying linebreak