Follows updated keyboard interaction rules

[ahmadayubi]

This PR:

• Doubles size of crosshair
• Focuses + (Zoom control) instead of parent div when clicking >|
• Doesn't hide the crosshair on keypresses as the crosshair is meant to indicate focus
• Space and Enter now query top layer
• Pressing Esc or closing using the close button now focuses the map afterwards with the crosshair visible
• Tabbing out of query popup focuses controls
• Shift + Tabbing out of query popup focuses map
• Shift + Tabbing out of feature popup focuses the current feature
• Re-adds close button to features popup

Closes #291

[prushforth]

Travis has run out of runway, disabling