Fix zoom button smaller on some application

[christianesperar]

What does this PR do ?

This will make the zoom button bigger on other app I tried to find related element but no one ovverride the style of this class

How should this be tested ?

Some app might contain this issue

What are the relevant issues ?

Nope, none

This Pull Request includes:

Just zoom css styling

What gif best describes how you feel about this work ?

[manifestinteractive]

There was a PR template with some questions that you deleted while submitting this Pull Request. I will need that information present in the PR in order to review it.

Here is the content that is required for all submitted pull requests:

https://raw.githubusercontent.com/manifestinteractive/jqvmap/master/.github/PULL_REQUEST_TEMPLATE.md

Once that is filled out, I will be able to take a look at this again.

[christianesperar]

Already update it

[kimbaudi]

For me, the button size issue happens when parent elements have box-sizing: inherit css styling. The way I resolve this issue is to override .jqvmap-zoomin, .jqvmap-zoomout css to set box-sizing: content-box

.jqvmap-zoomin, .jqvmap-zoomout {
  box-sizing: content-box;
}

[christianesperar]

Kindly update the status