When set to 1, secondaryTicks are not rendered

[hanastasov]

Description

secondaryTicks set to 1 does not render secondary ticks

• igniteui-angular version: 9.0.0-beta.4

Steps to reproduce

1. Add a slider with 1 secondary tick:
   <igx-slider [maxValue]="50" [primaryTicks]="6" [secondaryTicks]="1" [showTicks]="true" [step]="10" [type]="type"></igx-slider>

Result

Secondary ticks are not rendered

Expected result

Secondary ticks to be rendered