Improve UI for mapping link...The link is now always displayed, but it is only saved (for longer than 1 hour) if the user clicks Copy and Share (which automatically copies the link)
The width of the input field (in ch) is multiplied by 0.95 because it will always be a bit shorter than the length of the link in ch (which multiplies its length by the width of the character 0). This is the best solution I could come up with for setting the width of the field.