@Pattern on FlyToPointRequest Breaks Wayline Page

[aFraley]

In 1.8 users could use files with _ in the file path. In 1.9 this breaks the /wayline page and it still allows users to upload files with _ creating a broken state they are unable to recover from.

73f5ab4#diff-746a116ff34d40222f1c27be221e1a0a9d8aa67d729325cc68f33610d91cfafaL16

Steps to Reproduce:

1. upload a wayline file with _ in the path like spring_march.kmz through the example frontend Vue app.
2. refresh the wayline page

We have an existing deployment on 1.8 with production data in it that breaks under this recent change.