No feedback given to user when a video exceeds maximum file upload size

[fabacab]

When uploading media via Buoy, the incident interface provides no indication of a failed upload due to over-large file sizes.

• Platform: All
• Browser: All
• URL: N/A
• Is it reproducible: Yes

Steps to Produce/Reproduce

1. Create a new Buoy alert.
2. In the incident view, press the "Record" button in the incident toolbar.
3. Select or create a file that exceeds the WordPress instance's "Max upload file size" setting (fileupload_maxk) value.
4. Observe no feedback from the Buoy user interface.

Expected Results

A warning or other indication of an overly large file is given.

Actual Results

No interaction or feedback whatsoever is shown. There is no change in the interface.

Workarounds

Increase the filesize_maxk value manually in the WordPress admin (or Network Admin, for Multisite installs) screens, or upload smaller files. #186 covers adding this to the admin UI.

[hurtstotouchfire]

Fix should be either:

1. detect max file size from the server and provide this information to the client for pre-upload validation & messaging
2. catch failed upload errors and provide messaging to the user.

(I prefer 1)