Displaying a Basic Chart with RadChart

[rdlauer]

• improve UI with different colors for bars
• larger icons?

[rdlauer]

• Added a gif with this commit
• Also improved the display for the Core demo (sizes of emoji + colors of series)

@tjvantoll I couldn't figure out how to implement the Core changes in Vue or Angular at first glance. Doesn't seem like they use the same markup syntax?

[tjvantoll]

Love this change!

Angular: https://play.nativescript.org/?template=play-ng&id=8zpRGL&v=4
Vue: https://play.nativescript.org/?template=play-vue&id=en7KJC&v=3

I’m pretty sure Vue straight up doesn’t support Palette (it doesn’t crash but doesn’t work either), so I just left it out of that one.