Add tooltip to sort segments

public/_locales/en/messages.json

@@ -125,6 +125,9 @@
     "SubmitTimes": {
         "message": "Submit Segments"
     },
+    "sortSegments": {
+        "message": "Sort Segments"
+    },
     "submitCheck": {
         "message": "Are you sure you want to submit this?"
     },

src/components/SubmissionNoticeComponent.tsx

@@ -77,6 +77,7 @@ class SubmissionNoticeComponent extends React.Component<SubmissionNoticeProps, S
             <img id={"sponsorSkipSortButton" + this.state.idSuffix} 
                 className="sponsorSkipObject sponsorSkipNoticeButton sponsorSkipSmallButton"
                 onClick={() => this.sortSegments()}
+                title={chrome.i18n.getMessage("sortSegments")}
                 src={chrome.extension.getURL("icons/sort.svg")}>
             </img>;
         return (