Refactor handling of keyDown/keyUp (microsoft#1338)

This refactors / simplifies certain keyUp|Down event handling.
It will make a later change (adding textInput handling for textInput fields) easier (to review)

Co-authored-by: Scott Kyle <[email protected]>
# Conflicts:
#	React/Views/RCTViewKeyboardEvent.m

Author: 2 people

React/Views/RCTViewKeyboardEvent.m

@@ -52,15 +52,15 @@ + (NSString *)keyFromEvent:(NSEvent *)event
     return @"Backspace";
   } else if (code == NSDeleteFunctionKey) {
     return @"Delete";
-	} else if (code == NSHomeFunctionKey) {
-		return @"Home";
-	} else if (code == NSEndFunctionKey) {
-		return @"End";
-	} else if (code == NSPageUpFunctionKey) {
-		return @"PageUp";
-	} else if (code == NSPageDownFunctionKey) {
-		return @"PageDown";
-	}
+  } else if (code == NSHomeFunctionKey) {
+    return @"Home";
+  } else if (code == NSEndFunctionKey) {
+    return @"End";
+  } else if (code == NSPageUpFunctionKey) {
+    return @"PageUp";
+  } else if (code == NSPageDownFunctionKey) {
+    return @"PageDown";
+  }
 
   return key;
 }