Suggestion: Replace Dock Presence w/ MenuBar Icon

[dsc]

HSTracker by and large lives invisibly on top of Hearthstone. However, it tends to be the first thing in focus when you alt-tab out of HS due to its need to layer itself atop the game.

We could eliminate this (admittedly minor) annoyance by simply setting the app to appear in the MenuBar but not the Dock (preserving the app's only real features: Accessing Prefs; fiddling with Window; and accessing Replays/Decks. Many similar apps do this, and it can even be done with a setting in preferences.