Change the color for control blacks to make it slightly darker.

Change-Id: Ie8af4309cdcf8c5bd5c09acc80a3f98dfa40bebd
Fix Delete Button in Designer Component List.

The Button read “Delete Project” which is wrong. Turns out that the
“Delete” button was used in both project and non-project contexts
because it’s text read “Delete.” However when renaming to “Delete
Project” it causes the wrong message in the component designer
context. So now there are two different messages, “Delete” and “Delete
Project.”

This fixes Trac issue #550.

Change-Id: I3289ef6fe8de7ab205deec1cbad2cc52f4fa6e9f
Merge branch 'master' of http://github.com/mit-cml/appinventor-sources