You can select all tracks in a Playlist with two clicks, you don’t have to click each track. It just takes a few clicks and naming a new Playlist to get what you want as follows:
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View by Artist
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Select first Track (right click or long press)
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Select All (top left menu)
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Click the topmost 3 dot menu, choose Add to Playlist
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Click Create Playlist at the foot of the Playlist selection window
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Name the new Playlist and click Create
Enjoy !
The only tricky part is in the fourth step, make sure to use the topmost of the two three dot menus. The top three dot menu will shift the selected tracks in the order they currently appear on screen and renumber them, the bottom three dot menu will shift the contents of the playlist retaining original numbering and ordering.