tdf#127566: don't change divcopyable border width in onclick handler

Instead, define border width in respective CSS, to make it consistent
in both clicked and non-clicked states, and avoid "jumping" on click.

Change-Id: Ic8ab8d0fd586059e21de6aa866fef95226774acf
Reviewed-on: https://gerrit.libreoffice.org/c/help/+/87718
Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
diff --git a/help3xsl/default.css b/help3xsl/default.css
index eeaa160..fe70e42 100644
--- a/help3xsl/default.css
+++ b/help3xsl/default.css
@@ -296,6 +296,7 @@

.pycode,
.bascode {
    border: solid 5px transparent;
    margin-top: 15px;
    margin-bottom: 15px;
}
diff --git a/help3xsl/help.js b/help3xsl/help.js
index 75541e6..4876722 100644
--- a/help3xsl/help.js
+++ b/help3xsl/help.js
@@ -106,19 +106,17 @@
    (function() {
        var item = itemcopyable[i];

        function changeBorder(item, color, colorToChangeBackTo) {
        function changeBorder(item, color) {
            var saveBorder  = item.style.border;
            item.style.border = "solid 5px";
            item.style.borderColor = color;

            setTimeout(function() {
                item.style.border = saveBorder;
                item.style.borderColor = colorToChangeBackTo;
            }, 150);
        }
        item.onclick = function() {
            document.execCommand("copy");
            changeBorder(item, "#18A303", "transparent");
            changeBorder(item, "#18A303");
        };
        item.addEventListener("copy", function(event) {
            event.preventDefault();