fix(VBadge): round shape when were used icon prop

[volvachev]

The badge does not get a round shape when you use an icon prop

fixes #14991

Description

Motivation and Context

How Has This Been Tested?

visually

Markup:

 <v-list
      border
      class="mx-auto"
      max-width="256"
    >
      <v-list-item
        link
        prepend-icon="mdi-inbox-arrow-down"
        title="Inbox"
      >
        <template v-slot:append>
          <v-badge
            color="error"
            content="6"
            inline
          ></v-badge>
        </template>
      </v-list-item>
  
      <v-list-item
        link
        prepend-icon="mdi-send"
        title="Sent Mail"
      ></v-list-item>
  
      <v-list-item
        link
        prepend-icon="mdi-delete"
        title="Trash"
      >
        <template v-slot:append>
          <v-badge
            color="info"
            icon="mdi-instagram"
            inline
          ></v-badge>
        </template>
      </v-list-item>
  
      <v-list-item
        link
        prepend-icon="mdi-alert-circle"
        title="Spam"
      ></v-list-item>
    </v-list>

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)

[KaelWD]

This value only worked in v2 because badges had 2px extra inline padding and weren't display flex, now it makes icons way too cramped if you also have text next to them.

@nekosaur 87cc5af / 8cd727e

[KaelWD]

That means the old values for display and padding need to be brought back too, unless @nekosaur had some specific reason otherwise.

[nekosaur]

No I don't think so, or I don't remember.

[KaelWD]

Closing due to inactivity