Remove empty vertical spacing between items on PodcastDirectoryPage

[manutdkid77]

Issue 1
There was a lot of vertical spacing between items on PodcastDirectoryPage, noticeable on smaller devices Xiaomi Redmi 3s, Xperia M, iPhone SE.

Screenshots for Issue 1

Fix for Issue 1:
Set the height of row holding the artwork to 200, as the images themselves have a res of 200x200.

---

(Another related) issue 2
There was also the case that if the text was too long, then it wrapped on to the next line and created irregular item size.

Screenshot for Issue 2

Fix for Issue 2:
Set the LineBreakMode property to TailTruncation for the label holding the Title.

** Final Result With Fixes **

@jamesmontemagno Please suggest if these changes are fine or we need to discuss more ? 😄 🐒

[jamesmontemagno]

Hmmm the podcast art should a perfect Square that is my only comment there.

[manutdkid77]

@jamesmontemagno I've been working on creating a UI similar to AntennaPod and PocketCasts apps which I plan to use for the PodcastsDirectory page. I've created a sample repo for it.

[jamesmontemagno]

Changed a bunch how this works, so no longer needed, but thanks for the PR :)