Merge pull request #1055 from OpenTechFund/feature/disabled-button-styles

styles buttons with a disabled attr

opentech/static_src/src/sass/apply/components/_button.scss

@@ -9,6 +9,7 @@
         cursor: pointer;
     }
 
+    &:disabled,
     &.is-disabled {
         pointer-events: none;
         opacity: .5;