Navbar padding, help panel (x), copy mults (issue 855,962)

[juzen2003]

• Fixes #962, #855
• Were any Django, import pipeline, table_schema, or dictionary files modified? N
  • Database used: opus3_test_200107
  • All Django tests pass: Y
• Were any JavaScript or CSS files modified? Y
  • JSHINT run on all affected files: Y
  • Tested on Chrome, Firefox, Safari, and iOS: Y (Remember to test all browser sizes)
  • Tested for race conditions (with delayed API calls if applicable): NA

Description of changes:

• Fixed the issue to keep the spacing between Search/Browse Results/Cart/Detail the same even when the browser gets narrower.
• Fixed the issue that the position of "OPUS" (on the top left corner) will jump a bit when browser gets narrow.
• Make input texts and hints copiable in widgets with checkboxes and radio buttons.
• Make sure "x" in the help panel is vertically aligned with the header text.

Known problems:

• Hold & copy texts and hints for checkboxes and radio buttons will not work in iOS . (It should work by default, haven't found the solution for this.)

[rfrenchseti]

The black navbar is slightly shorter than it used to be. Is that intentional? Question asked on opus-dev-chat to see which people prefer.

[rfrenchseti]

I verified the mult text copy functionality with Debby's recently merged pull and it does the correct thing.

[rfrenchseti]

The Select Metadata dialog header is now slightly taller, but it is consistent with the other modal dialogs (previously it was shorter than the others).

I made the nav bar the same height it used to be because I think it looks better a little taller. To do this I added:

/* Make the main nav bar just a little taller than normal (style says 8px) */
#op-main-nav {
    padding-top: 10px;
    padding-bottom: 10px;
}

[rfrenchseti]

• Database used: N/A
• All Django tests pass: NA
• JSHINT run on all affected files: N/A
• Tested on Chrome, Firefox, Safari, and iOS: Y (Remember to test all browser sizes)
• Tested for race conditions (with delayed API calls if applicable): NA