Import e8da426df1: Updated some button styling (by Maki)

[daleglass]

This is an automated proposal to look at a commit made by Maki and import it into Overte

Commit:	e8da426df1b5935e747ac055cd7cc2719d4c4761
Author:	Maki
Date:	Sun, 29 Mar 2020 13:33

Updated some button styling

Stats:

Filename	Stats	Lines	Added	Removed	Lines in blame
interface/resources/qml/controlsUit/Button.qml		41	11	30	11
interface/resources/qml/stylesUit/HifiConstants.qml		51	48	3	48
2 files	-	92	59	33	59

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