Combobox design fixes (#1492)
* changing combobox button width to be 32px
* updating combobox action button style when menu is open
* tentative stab at adjusting label and combobox input distance
* updating css to match textfield 5.3 XD
* adding line height to quiet textfield input to match XD
fixes the icon position for quiet textarea w/ validation and normal icon
* fixing combobox field button hover styles so they dont apply for isQuiet
* updating textfield and inputgroup quiet focus styles
when field is focused (not keyboard focused just clicked), should not have a box-shadow
* fixing quiet combobox menu so input text aligns with menu text
* making fieldbutton gray 900 hover style only appear if the button itself is hovered
* altering textfield label text line height to match XD design
this value matched my photoshop overlap comparison between XD and storybook best
* adding negative margin so label can use line height specified in XD
* removing label positioning changes
* fixing invalid quiet combobox boxshadow so it only appears on keyboard focus
* passing isPressed to combobox button when popover is open
* removing some extraneous props
