Table cells - grey outlines stand out oddly

[drawcard]

Related to: #146 which I just raised - it would be nice if table cell outlines also used RGBA to be tinted, so they better integrate into coloured page backgrounds:

table td, table th {
    padding: 15px;
    line-height: 1.5;
    vertical-align: top;
    border: 1px solid rgba(128,128,128,0.15);
}

Although this is a very similar grey to the original, it blends in slightly better with various colours and also stands out on dark backgrounds.

[vovkasolovev]

I wrote about this problem with colors in the issue #126

[bkjproductions]

Definitely agree that the table cells, if they have to have a color, should be rgba.

While we are talking about this, can we also remove the "hover" from the css? It doesn't belong there---making a table cell change its background color is a (false) visual cue that clicking the cell might do something. Which in most cases it does not.

[arielk]

Merge #126