Format Library: Text-color popover width to fit sidebar (#68881)

Co-authored-by: shimotmk <[email protected]>
Co-authored-by: Mamaduka <[email protected]>

packages/format-library/src/text-color/style.scss

@@ -1,6 +1,13 @@
+// Must equal $color-palette-circle-size from:
+// @wordpress/components/src/circular-option-picker/style.scss
+$swatch-size: 28px;
+$swatch-gap: 12px;
+$panelPadding: $grid-unit-20;
+
 .format-library__inline-color-popover {
 
 	[role="tabpanel"] {
-		padding: 16px;
+		padding: $panelPadding;
+		width: ( $swatch-size * 6 ) + ( $swatch-gap * 5 ) + ( $panelPadding * 2 );
 	}
 }