Localization

[aruniverse]

• add localization client ourselves in base initializer instead of having core default it for you
• fixed desktop localization (i18n file named the same so it never picked up the right strings)
• minor scss changes requested by bill

[bsteinbk]

@aruniverse - Here is the code the I put in my-3.0-viewer to set UI defaults to Gino's latest recommendations. Maybe you could set these some else so users do not need to do this.

const onIModelAppInit = () => { UiShowHideManager.setAutoHideUi(true); UiShowHideManager.setUseProximityOpacity(false); }