Simplify like/unlike buttons styles on small screens

Since we're now using a flex layout, the styles are more robust when we
keep the percentages below each button even on small screens.

app/assets/stylesheets/participation.scss

@@ -605,14 +605,9 @@
     }
 
     .total-votes {
-      float: right;
+      display: block;
       font-weight: bold;
       line-height: $line-height * 2;
-
-      @include breakpoint(medium) {
-        display: block;
-        float: none;
-      }
     }
   }
 }

app/assets/stylesheets/shared/in_favor_against.scss

@@ -1,9 +1,5 @@
 .in-favor-against {
-  @include flex-with-gap($line-height * 0.25);
-
-  @include breakpoint(medium) {
   @include flex-with-gap($line-height * 0.75);
-  }
 
   &,
   .in-favor,
@@ -77,16 +73,8 @@
   }
 
   .percentage {
-    display: inline-block;
-    font-size: $small-font-size;
-    line-height: $line-height * 2;
-    padding-right: calc($line-height / 2);
-    vertical-align: top;
-
-    @include breakpoint(medium) {
     display: block;
+    font-size: $small-font-size;
     line-height: $line-height;
-      padding-right: 0;
-    }
   }
 }