Some random fixes and more icons

[cchaos]

Added to reset.scss

• Default button to text align left
• No margins for <hr>

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Bug fixes

• fixes [EuiButton] Add isLoading property #418 Add isLoading prop to EuiButton
• fixes EuiAccordion's method onToggleOpen is misleading #421 Changed EuiAccordion’s onToggleOpen to onToggle
• fixes Selection highlight of code is inconsistent #397 Only apply the $euiCodeBlockSelectedBackgroundColor variable if it is a color

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Misc

• Square instead of circle for indeterminate checkbox (and better error handlers in SASS)

• Fix text-overflow on buttons (text-overflow property has to be on the first parent of the text).

• Remove left padding from form style EuiAccordion. Gives more room for the button horizontally and lines up contents better.

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More icons

• eye & eyeClosed
• grab
• heatmap
• vector

[snide]

Looks good. I somewhat remember putting in the button left-align stuff at some point, and then we didn't do it for some reason (or maybe it just sat in a dead PR). I think you talked me out of it? I can't remember. But seems good.

Only thing we might want to change is make the loading spinner use an opacity for the "gray" part of the ring so that it always appears darker on whatever its used on. Right now it looks a little odd if its a darker gray background. Can do that later, no hurry.

[snide]

Changed EuiAccordion’s prop of onToggleOpen to onToggle

[snide]

Now that I think about it, I think we flipped on this because it broke something in Kibana directly. Lots of generic "button" tags there.

[cchaos]

hmm ok, I'll revert it

[cchaos]

@snide I did you one better and I added a class to the spinner inside the button and colored it according to it's button's text color.

[snide]

Perfect.