MDL-76147 gradereport_grader: Fix collapsing preferences.

At certain cases I didn't see a tick in view mode. For example
when I click grades only and then switch to totals only a tick
next to total only was not shown. I think this is caused since before
mode was changed in circlurar order i.e.
fullmode->grade only->aggregate only->fullmode. But now any order is
possible so we need to respect it

grade/report/grader/lib.php

@@ -1893,6 +1893,10 @@ class grade_report_grader extends grade_report {
 
         switch ($action) {
             case 'switch_minus': // Add category to array of aggregatesonly
+                $key = array_search($targetid, $collapsed['gradesonly']);
+                if ($key !== false) {
+                    unset($collapsed['gradesonly'][$key]);
+                }
                 if (!in_array($targetid, $collapsed['aggregatesonly'])) {
                     $collapsed['aggregatesonly'][] = $targetid;
                     static::set_collapsed_preferences($courseid, $collapsed);