minor style fix

fittrackee_client/src/components/Activity/ActivityForms/FormWithGpx.jsx

@@ -57,7 +57,7 @@ function FormWithGpx (props) {
             gpxLimit} files max):
             <input
               accept=".gpx, .zip"
-              className="form-control input-lg"
+              className="form-control form-control-file gpx-file"
               disabled={loading}
               name="gpxFile"
               required
@@ -95,7 +95,7 @@ function FormWithGpx (props) {
           <input
             type="submit"
             className="btn btn-secondary btn-lg btn-block"
-            onClick={() => history.go(-1)}
+            onClick={() => history.push('/')}
             value="Cancel"
           />
         </div>

fittrackee_client/src/components/Activity/ActivityForms/FormWithoutGpx.jsx

@@ -123,7 +123,7 @@ function FormWithoutGpx (props) {
       <input
         type="submit"
         className="btn btn-secondary btn-lg btn-block"
-        onClick={() => history.go(-1)}
+        onClick={() => history.push('/')}
         value="Cancel"
       />
     </form>