Implement "Paste" button changes as described in 1
Implement "Replace" popup changes as described in 2
"Paste" button changes apply only to a "Paste" button for existing content (just the "Paste" button that triggers "Replace content" popup). Changes:
"Paste" button label is renamed to "Paste & Replace"
Browser tip is renamed to: "Replace existing content with H5P Content from the clipboard"
Other paste buttons should not be affected by the change above so:
When paste over new, empty node - "Paste" button is unchanged
CP, IV, DnD, and the Hub paste buttons are unchanged
Change the title to: "Replace Content"
Change the description to: "By doing this you will replace the current content with the content from your clipboard. The current content will be lost. Are you sure you wish to continue?"
Change the button to: "Replace content"