Fix disabled b-select and b-input having different opacity

[service-paradis]

Fix #2599

Proposed Changes

• Force opacity: 1 for select since Browsers (at least Chrome) are setting opacity: 0.7
• This way, disabled select and disabled input have the same look

[kashifusman]

its still not fixed on safari /IOS

[kashifusman]

any suggestion for safari to make select and input same in color

[sanouisiaka]

I had the same issue and adding -webkit-text-fill-color: $input-disabled-color; worked for me.