timepicker: support change size of the chevrons

[peterhe2000]

Hi. Is it possible to change size of the chevrons?

Version of Angular, ng-bootstrap, and Bootstrap:

Angular: 2.4.5

ng-bootstrap: 1.0.0-alpha.20

Bootstrap: 4.0.0-alpha.6

[dmytroyarmak]

@peterhe2000 Please use StackOverflow for general help questions: https://github.com/ng-bootstrap/ng-bootstrap#getting-help

[pkozlowski-opensource]

@dmytroyarmak I think that the issue here is that chevrons are not scalling properly with the size option. We should convert them to svg and scale properly. This would be a good issue if you are looking for one :-)

[dmytroyarmak]

@pkozlowski-opensource Yeah, they are always the same will all "size" options.
We can also do it in a little bit different way - we can for different "size" attributes change class on buttons with chevron to btn-sm, btn-lg or no additional class. Changes of the button will cause increasing or decreasing of font size and it will make chevron bigger or smaller.
What do you think about this approach?

[pkozlowski-opensource]

@dmytroyarmak if sticking different class names on buttons does the trick, then yes, please open a PR. Thnx!