[Bug]: Exception thrown when loading file array in relation display name

[mjadobson]

Reproduced on https://pocketbase.io/demo/ (0.13.1):

Setup:
TableA has file field files that allows multiple files
TableA has one or more records where files contains multiple files
TableB sets up relation to TableA, in the display fields setting, files is included.
When these rows are viewed in UI, this error is thrown:

Uncaught (in promise) TypeError: e.toLowerCase is not a function
    at index-c7ee28f0.js:4:125048
    at Array.find (<anonymous>)
    at H.hasImageExtension (index-c7ee28f0.js:4:125038)
    at H.getFileType (index-c7ee28f0.js:4:125337)
    at n.$$.update (index-c7ee28f0.js:120:40804)
    at ve (index-c7ee28f0.js:4:7806)
    at new iu (index-c7ee28f0.js:120:40998)
    at yp (index-c7ee28f0.js:120:50055)
    at kp (index-c7ee28f0.js:120:50355)
    at DM (index-c7ee28f0.js:120:50739)

This is because hasImageExtension() is receiving an array (of file ids), not a string as expected.

[ganigeorgiev]

Thank you. I've pushed a fix in master and it will be available with the next minor v0.13.2 release sometime later this week.