revealjs - simple and serif should have their heading color defaults to body-color

(cherry picked from commit f8a9a3c)

Author: cderv

package/src/common/patches/revealjs-theme-0001-simple.patch

@@ -28,7 +28,7 @@ index f0472d7b9..3b1e3cbdc 100644
 +$font-family-sans-serif: "Lato", sans-serif !default;
 +$body-color: #000 !default;
 +$presentation-heading-font: "News Cycle", sans-serif !default;
-+$presentation-heading-color: #000 !default;
++$presentation-heading-color: $body-color !default;
 +$presentation-heading-text-shadow: none !default;
 +$presentation-heading-text-transform: none !default;
 +$body-bg: #fff !default;

package/src/common/patches/revealjs-theme-0001-sky.patch

@@ -28,7 +28,7 @@ index 62a52b782..2debff7bc 100644
 +$font-family-sans-serif: "Open Sans", sans-serif !default;
 +$body-color: #333 !default;
 +$presentation-heading-font: "Quicksand", sans-serif !default;
-+$presentation-heading-color: #333 !default;
++$presentation-heading-color: $body-color !default;
 +$presentation-heading-letter-spacing: -0.08em !default;
 +$presentation-heading-text-shadow: none !default;
 +$body-bg: #f7fbfc !default;

src/resources/formats/revealjs/themes/simple.scss

@@ -19,7 +19,7 @@
 $font-family-sans-serif: "Lato", sans-serif !default;
 $body-color: #000 !default;
 $presentation-heading-font: "News Cycle", sans-serif !default;
-$presentation-heading-color: #000 !default;
+$presentation-heading-color: $body-color !default;
 $presentation-heading-text-shadow: none !default;
 $presentation-heading-text-transform: none !default;
 $body-bg: #fff !default;

src/resources/formats/revealjs/themes/sky.scss

@@ -17,7 +17,7 @@
 $font-family-sans-serif: "Open Sans", sans-serif !default;
 $body-color: #333 !default;
 $presentation-heading-font: "Quicksand", sans-serif !default;
-$presentation-heading-color: #333 !default;
+$presentation-heading-color: $body-color !default;
 $presentation-heading-letter-spacing: -0.08em !default;
 $presentation-heading-text-shadow: none !default;
 $body-bg: #f7fbfc !default;