[JENKINS-72018] Form entries in .repeated-chunk using .show-if-not-on…

…ly CSS class are not hidden when they are alone (#8491)

* -	Add the missing definition for the .only CSS class inside of .repeated-chunk .show-if-not-only ones. Without these CSS classes, form entries using .show-if-not-only class are not hidden when alone.

* Update war/src/main/scss/form/_reorderable-list.scss

Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>

* Update war/src/main/scss/form/_reorderable-list.scss

Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>

* Update war/src/main/scss/form/_reorderable-list.scss

Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>

---------

Co-authored-by: Francis Labrie <francis.labrie@cgi.com>
Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>

war/src/main/scss/form/_reorderable-list.scss

@@ -29,6 +29,10 @@
   visibility: visible;
 }
 
+.repeated-chunk.first.last .show-if-not-only {
+  visibility: hidden;
+}
+
 /* == nested repeatable elements / 2 deep == */
 .repeated-chunk .repeated-chunk .show-if-last {
   visibility: hidden;
@@ -50,6 +54,10 @@
   visibility: visible;
 }
 
+.repeated-chunk .repeated-chunk.first.last .show-if-not-only {
+  visibility: hidden;
+}
+
 /* == nested repeatable elements / 3 deep == */
 .repeated-chunk .repeated-chunk .repeated-chunk .show-if-last {
   visibility: hidden;
@@ -67,10 +75,14 @@
   visibility: hidden;
 }
 
-.repeated-chunk .repeated-chunk .show-if-not-only {
+.repeated-chunk .repeated-chunk .repeated-chunk .show-if-not-only {
   visibility: visible;
 }
 
+.repeated-chunk .repeated-chunk .repeated-chunk.first.last .show-if-not-only {
+  visibility: hidden;
+}
+
 /*
     <DIV>s marked with to-be-removed is used in conjunction with repeatable.jelly and hetero-list.jelly
     and represents a master copy that gets pulled out from HTML, then inserted later upon demand multiple times