Fixing WordPress dashicons popup (recommendations)

Using the icon16 class makes the clickable area of each icon overlap the icon above it.

1. Remove the icon16 class from each icon.
2. Add styles without floating: `
.ws_icon_option { display: inline-block; margin: 0 2px 2px; }
`
3. Change the color (you could add the howto class to the “ws_core_icons_tab” container for a medium-dark gray, or you could set your own color in the .ws_icon_option styles).

Other recommendations:
1. To stop some PHP warnings, remove screen_icon('edit-pages');
2. Make the loading image reference relative: src="./images/loading.gif"