style: split display in start and end

Signed-off-by: peterpeterparker <[email protected]>

Author: peterpeterparker

webcomponents/slides/split/src/components/slide/deckdeckgo-slide-split.scss

@@ -27,19 +27,20 @@ div.deckgo-slide-split {
       ) / 2
   );
 
-  display: flex;
   align-items: var(--slide-split-align, inherit);
   text-align: var(--slide-split-text-align, inherit);
 
   padding: var(--slide-split-padding-top, 0) var(--slide-split-padding-end, var(--slide-padding-end-default)) var(--slide-split-padding-bottom, 0)
     var(--slide-split-padding-start, var(--slide-padding-start-default));
 
   &.deckgo-slide-split-start {
+    display: var(--slide-split-display-start, flex);
     background: var(--slide-split-background-start);
     color: var(--slide-split-color-start);
   }
 
   &.deckgo-slide-split-end {
+    display: var(--slide-split-display-end, flex);
     background: var(--slide-split-background-end);
     color: var(--slide-split-color-end);
   }