Manual assignment page includes a hidden 'showforce' input.

This ensures that API requests, such as are generated when a user sorts a
column, override conflicts automatically. (The manual assignment page
overrides conflicts automatically.)

manualassign.php

@@ -291,6 +291,7 @@ function show_ass_elements($pl) {
         echo '<div class="entryi"><label>Show</label>',
             '<ul class="entry inline">', join('', $show_data), '</ul></div>';
     }
+    echo Ht::hidden("forceShow", 1, ["id" => "showforce"]); // search API must override conflicts
     echo '<div class="entryi autosave-hidden hidden"><label></label><div class="entry">',
         Ht::submit("update", "Save assignments", ["class" => "btn-primary btn big"]), '</div></div>';
     echo '</div>';

scripts/script.js

@@ -6300,7 +6300,8 @@ function search_sort_url(self, href) {
     var hrefm = /^([^?#]*(?:search|reviewprefs|manualassign)(?:\.php)?)(\?[^#]*)/.exec(href),
         api = hrefm[2], e;
     if ((e = document.getElementById("showforce"))) {
-        api = api.replace(/&forceShow=[^&#;]*/, "") + "&forceShow=" + (e.checked ? 1 : 0);
+        var v = e.type === "checkbox" ? (e.checked ? 1 : 0) : e.value;
+        api = api.replace(/&forceShow=[^&#;]*/, "") + "&forceShow=" + v;
     }
     if (!/[&?]q=/.test(api)) {
         api += "&q=";