WIP: Prepwork for EUI in Kibana

[snide]

Small CSS reset fixes to prep Kibana for EUI.

[cjcenizal]

Filter bar

• This seems to affect all ui-select instances. The placeholder text is too small.

Visualize

• Space between the "Add Filter" button and the content after it (input label or "Advanced" accordion) needs to be bigger

• There's extra padding added to the left of the "Show empty buckets" checkbox

• The "Use CIDR Masks" button needs space beneath it

• Needs more space above "Add" button

• Needs more space below "Advanced" button

• The label for the first input wraps, causing alignment to get thrown off

• This error's text has really tight line-height, and the antialiasing treatment we apply to text makes it really hard to read

• Does this gray text pass the color contrast checker?

• The padding inside of this "Required" panel looks too tight
• The space below the "Add Range" button is too tight

• The Data Table vis options has too little space between labels and inputs

• For the Coordinate Map vis, there's too little space between the checkboxes and the "Custom label" label

• Not enough space between "Map type" label

• Too tight spacing

• TSVB annotations empty state spacing is too tight

• TSVB markdown explanatory text has too-tight line-height

• Input controls is missing space between the select and the button

• Tag cloud is missing space between labels and inputs

Reporting

• Too-tight spacing

Management

Index patterns

• Space between labels in scripted field form is too tight
• Warnings and help look kind of messed up, especially the code examples in the "Scripting Help" panel

Advanced settings

• <td> element used to have vertical-align: middle but with this removed the cell content gets all messed up.

[snide]

@cjcenizal got all of the above (minus the autocomplete one). Couldn't figure out how that code was constructed. Looks like the input just needs kuiTextInput on it.

[cjcenizal]

Cross-referencing #15564 so there's a back-link.