fix(VFileInput): avoid input field event capturing in safari

[ahocevar]

Description

This pull request avoids that the native input[type="file"] field receives events when clicking on the input part of v-file-input.

Fixes #10832.

Motivation and Context

With this change, v-file-input works as expected in Safari, as described in #10832.

How Has This Been Tested?

I tested the change locally with the code provided in https://codepen.io/anon/pen/RXaPOX?&editable=true&editors=101.

Markup:

<div id="app">
  <v-app id="inspire">
    <v-file-input label="File input"></v-file-input>
  </v-app>
</div>

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Improvement/refactoring (non-breaking change that doesn't add any features but makes things better)

Checklist:

• The PR title is no longer than 64 characters.
• The PR is submitted to the correct branch (master for bug fixes and documentation updates, dev for new features and backwards compatible changes and next for non-backwards compatible changes).
• My code follows the code style of this project.
• I've added relevant changes to the documentation (applies to new features and breaking changes in core library)

[ahocevar]

Since this has not gotten any attention for 6 weeks, can someone please give me guidance on what else would have to be done on my end to get this reviewed? Thanks in advance.

[TPXP]

Thank you so much for digging into this, you made my day!

[johnleider]

Not intentionally ignored. My focus was on the new documentation.