refactor(css): add styles targeting SVG button/modal icons (#1464)

* refactor(css): add global classes for common icon types

* refactor(css): target child SVGs instead of creating new icon classes

* fix: fix ButtonWithDropdown style class spacing

src/components/RequestModal/MovieRequestModal.tsx

@@ -236,7 +236,7 @@ const MovieRequestModal: React.FC<RequestModalProps> = ({
         }
         secondaryButtonType="danger"
         cancelText={intl.formatMessage(globalMessages.close)}
-        iconSvg={<DownloadIcon className="w-6 h-6" />}
+        iconSvg={<DownloadIcon />}
       >
         {isOwner
           ? intl.formatMessage(messages.pendingapproval)
@@ -294,7 +294,7 @@ const MovieRequestModal: React.FC<RequestModalProps> = ({
             )
       }
       okButtonType={'primary'}
-      iconSvg={<DownloadIcon className="w-6 h-6" />}
+      iconSvg={<DownloadIcon />}
     >
       {hasAutoApprove && !quota?.movie.restricted && (
         <div className="mt-6">