Fixed broken Multiple property

[AlexanderNorup]

Hi. Thanks for making this great package.

I noticed that the Multiple property on OpenFilePickerOptionsStartInWellKnownDirectory and OpenFilePickerOptionsStartInWellKnownDirectory did not work. No matter what the property was set to, it would always just open in "single-file" or "single-directory" mode.
This seemed to be because of an inverted if-check.

I built it locally with the proposed changes, which fixed the issue.

[KristofferStrube]

Super nice catch Alexander. 👍

I have tested your fork and it works now.

Could be nice to capture that this now works as there isn't a sample page that opens multiple files.
Would you be up for adding a sample page that uses multiple files as a part of the PR?
Totally okay if you don't have a good example or don't want to, then I will just think of one during the next couple of days.
Could be using this component https://github.com/lzinga/BlazorTextDiff

[AlexanderNorup]

Hi again,

I added a simple sample page that demoes opening multiple files. See below:

chrome_2022-07-12_18-40-00.mp4

If you have visions for bigger and more exciting demo pages, I'm sorry to dissapoint.

[KristofferStrube]

Awesome!
I will publish this to Nuget as a bug fix release later tonight.

[KristofferStrube]

Hah. Wrong button. 😄