[upload] buttons border fix

public/css/gogs.css

@@ -3403,3 +3403,9 @@ textarea#description {
   font-weight: bold;
   text-align: center;
 }
+#file-buttons > a:first-child {
+  border-top-left-radius: .28571429rem;
+  border-bottom-left-radius: .28571429rem;
+  border-top-right-radius: 0;
+  border-bottom-right-radius: 0;
+}

public/less/_gin.less

@@ -260,3 +260,10 @@ textarea#description {
   font-weight: bold;
   text-align: center;
 }
+
+#file-buttons > a:first-child {
+  border-top-left-radius: .28571429rem;
+  border-bottom-left-radius: .28571429rem;
+  border-top-right-radius: 0;
+  border-bottom-right-radius: 0;
+}