Bug report: quotation marks in css

Hi,

thanks for making this great plugin! I noticed today a little bug concerning the CSS edit field. I wanted a little more complex CSS in order to display an on-mouse-over message that the Link is broken (and has not been deliberately crossed-out by the author). I pasted the following snippet into the CSS box:

.broken_link, a.broken_link {
	  border-bottom: 1px dotted red;
	  position: relative;
	}
	.broken_link:after, a.broken_link:after {
	  content: "Link checker has marked this link as broken";
	  display: none;
	  font-size: smaller;
	  background-color: white;
	  border: 1px solid #CCCCCC;
	  border-radius: 3px;
	  padding: 2px 4px;
	  position: absolute;
	  top: 2em;
	  left: 50%;
	  white-space: nowrap;
	}
	.broken_link:hover, a.broken_link:hover {
	  cursor: pointer;
	}
	.broken_link:hover:after, a.broken_link:hover:after {
	  display: inline-block;
	}

After submitting the line

content: "Link checker has marked this link as broken";

comes back as

content: \"Link checker has marked this link as broken\";

and the generated CSS is the same with the result that the content parameter is ignored due to invalid property value.

I then edited the mysql DB directly and it worked. So I suppose there is a bug with the escapes.

Any chance this might get fixed?

Thanks,
Philipp

https://ww.wp.xz.cn/plugins/broken-link-checker/