MDL-82816 mod_assign: Rename 'View Grader' action button to 'Grade'

Renames the 'View Grader' action button to 'Grade' and deprecates
the 'viewgrader' string which is no longer used.

mod/assign/lang/en/assign.php

@@ -675,7 +675,6 @@ $string['viewfeedback'] = 'View feedback';
 $string['viewfeedbackforuser'] = 'View feedback for user: {$a}';
 $string['viewfullgradingpage'] = 'Open the full grading page to provide feedback';
 $string['viewgradebook'] = 'View gradebook';
-$string['viewgrader'] = 'View Grader';
 $string['viewgradingformforstudent'] = 'View grading page for student: (id={$a->id}, fullname={$a->fullname}).';
 $string['viewgrading'] = 'View all submissions';
 $string['viewownsubmissionform'] = 'View own submit assignment page.';
@@ -694,3 +693,4 @@ $string['attemptreopenmethod_none'] = 'Never';
 $string['choosegradingaction'] = 'Grading action';
 $string['groupoverridesdeleted'] = 'Group overrides deleted';
 $string['useroverridesdeleted'] = 'User overrides deleted';
+$string['viewgrader'] = 'View Grader';

mod/assign/lang/en/deprecated.txt

@@ -2,3 +2,4 @@ attemptreopenmethod_none,mod_assign
 groupoverridesdeleted,mod_assign
 useroverridesdeleted,mod_assign
 choosegradingaction,mod_assign
+viewgrader,mod_assign

mod/assign/templates/grading_actionmenu.mustache

@@ -70,7 +70,7 @@
         {{/pagereset}}
         {{#graderurl}}
         <div class="navitem ms-sm-auto align-self-center">
-            <a class="btn btn-primary" href="{{graderurl}}">{{#str}}viewgrader, mod_assign{{/str}}</a>
+            <a class="btn btn-primary" href="{{graderurl}}">{{#str}}gradeverb, core{{/str}}</a>
         </div>
         {{/graderurl}}
     </div>

mod/assign/tests/behat/page_titles.feature

@@ -30,5 +30,5 @@ Feature: In an assignment, page titles are informative
     Then the page title should contain "C1: History of ants"
     And I follow "View all submissions"
     And the page title should contain "C1: History of ants - Grading"
-    And I click on "Grade" "link" in the "Student 1" "table_row"
+    And I click on "Grade" "link" in the ".tertiary-navigation" "css_element"
     And the page title should contain "C1: History of ants - Grading"