feat(deploy): Simplifies deploy overview (#508)

This simplifies the deploy overview, to only show 3 version fields:
- CURRENT DEPLOYMENT
- CURRENT ENV
- NEW DEPLOYMENT

It also fixes a few errors around version detection

Reviewed-on: toolshed/abra#508
Co-authored-by: p4u1 <p4u1_f4u1@riseup.net>
Co-committed-by: p4u1 <p4u1_f4u1@riseup.net>

pkg/app/app_test.go

@@ -223,16 +223,4 @@ func TestWriteRecipeVersionOverwrite(t *testing.T) {
 	}
 
 	assert.Equal(t, "foo", app.Recipe.EnvVersion)
-
-	app.Recipe.Dirty = true
-	if err := app.WriteRecipeVersion("foo+U", false); err != nil {
-		t.Fatal(err)
-	}
-
-	app, err = appPkg.GetApp(testPkg.ExpectedAppFiles, testPkg.AppName)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	assert.Equal(t, "foo+U", app.Recipe.EnvVersion)
 }