* Abstract FillColorIndicator and StrokeColorIndicator to ColorIndicator
* Replace stroke color reducer with stroke style reducer
* Add color style proptype
* Clear stroke gradient in line mode
A "style" refers to something that can fill/stroke a shape.
Currently that's either a solid color or a gradient of some orientation.
The selection gradient type reducer has been removed and folded into the
"fill style" reducer.
* Make PaintEditor component rtl aware
Fixes the color-picker and any other popover elements.
Adds an RTL prop to the PaintEditor that initializes the `layout` state in redux. Any other components that need to know the layout refer to the state in redux.
I debated whether the state should just be a boolean (true for RTL), or ‘rtl’, ‘ltr’. I went with the latter, but could be convinced that boolean would be better.
I did not add `dir=“rtl”` to the font picker dropdown as all the names are in LTR languages.
Question: Should the sliders reverse direction, and if so, is it worth doing right now when the layout of the color picker may change.
Adding the rtl prop and the `dir=…` to the PaintEditorComponent fixes layout issues in the playground.
* Don’t reverse gradient swatches: the fill colors (and swatch preview) should represent the way the left-right colors will blend when filling a shape.
It works well to keep track of the previously active tool in redux, and reactivate that tool when the eye dropper is finished. This takes `eye-dropper` out of the mode tool reducer too, which is nice.
