add preventDefaultEvent flag to ngResizable mousedown

[mecp]

We use https://github.com/zzarcon/default-passive-events in our project, which makes mousedown a passive event, so when using Resizable directive, it produced

Unable to preventDefault inside passive event listener invocation.

[Yamazaki93]

A suggestion, it seems the original ngResizable behavior is to call preventDefault() and this changes it to not call preventDefault() since Input() preventDefaultEvent = false; unless specifically overridden. It might be better to use the negation of that so users who doesn't want ngResizable to call preventDefault() will set [preventDefaultEvent]="false"

[mecp]

@Yamazaki93 that's a good suggestion, thanks. will update it.

[xieziyu]

@mecp @Yamazaki93
Thank you for your contribution. It's helpful.