Console Icon css class should be `icon-sm` instead of `icon-xlg`

[MrRahulR]

Jenkins Version - Jenkins v2.346.2
Theme Version - v1.3.3

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I noticed the console icon is looking larger than other icons, by checking the CSS I saw it has the class icon-xlg instead of icon-sm which seems aligned well with other icons.

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Current Design -

After replacing the class icon-xlg to icon-sm -