Keyword List: Lightroom CC (desktop / Mac)?

Apologies if this has been asked before, did a lot of searches but everything I turned up relates to LR Classic.  Using LR CC 1.5 on a Mac, if I have images I want to add keywords to, when I select 'Keyword' from the bottom right I merely get an input dialogue box, I don't get any list of selectable keywords.  Is that right or do I have something configured wrong?

It's a bit annoying as I invariably use the same keywords over and over and have to type them out over and over instead of typing 'Catwalk' once then being able to select that from a Keyword Tree.  Time consuming as I'm currently importing old files so am doing this repeatedly.  Partially concerned also in that I don't inadvertently mis spell a keyword when typing out on a per photo / group of photos basis.  Maybe LRCC doesn't have the feature yet but it seems odd to have to keep typing keywords over and over rather than just being able to select them