Tooltip: Adjust placement of tooltips to avoid overlapping their trigger

[shaunandrews]

The tooltip's that show throughout the editor sometimes overlap with the button or element that triggers the tooltip. Here's a few examples:

This doesn't seem to be the case for the block toolbar, which gives the tooltip a little more breathing room:

I think we should take this same approach everywhere the tooltip is displayed. Here's how it could work adding more space to the above examples:

[ramonjd]

Just tooling around with this a bit.

Assuming the position is "bottom", adding this to packages/components/src/tooltip/style.scss has some effect

.components-tooltip {
	margin-top: $grid-unit-15;
}

There would have to be overriding classes for "top" and the other positions probably.

[jordesign]

I'm no longer able to reproduce the issue in the locations mentioned above (or elsewhere) in WP6.5 - tooltips all appear to offer some spacing between the element and the tip. Accordingly I'll close this as unreproducible,