Merge pull request #907 from tylerjenningsw/enhance/toolbar-gradient-swatch

Shapes: the toolbar's gradient swatches open the Gradient Editor (#612)

# Conflicts:
#	docs/gaps.md

docs/gaps.md

@@ -145,6 +145,11 @@ The most important missing piece: it turns every other estimate here into a meas
   tests, checked headlessly on Windows, drag a selected Gradient Fill's start and end points in
   the Composition viewer: one undo step, the layer stays, a point inside a moved and scaled group
   converts to the group's space, and the handles show only for a selected gradient.
+- Regression evidence for the toolbar's gradient swatches (#612, reported on Discord): the
+  `ui_toolbar_gradient` input tests, checked headlessly on Windows, click a Linear Fill swatch and
+  a Radial Stroke swatch on a selected shape layer and get the Gradient Editor on its Gradient Fill
+  / Gradient Stroke Colors (OK saves); without such a gradient the swatch still opens the options,
+  and the words, Solid swatches and Alt-click are unchanged.
 - Regression evidence for the reports of 6 October, checked headlessly on Windows: real pointer
   drags in `ui_drag_drop` (Project items into the Timeline between layers and at a time, and onto
   the viewer; an effect onto a layer in the viewer: #85, #88, #89), `ui_render_queue` (a template