MOBILE-3235 core: Rename 'category' context level to 'coursecat'

Renamed in order to remain consistent with the LMS.

src/addon/calendar/pages/event/event.html

@@ -60,7 +60,7 @@
                 </ion-item>
                 <a ion-item text-wrap *ngIf="categoryPath">
                     <h2>{{ 'core.category' | translate}}</h2>
-                    <p><core-format-text [text]="categoryPath" contextLevel="category" [contextInstanceId]="event.category.id"></core-format-text></p>
+                    <p><core-format-text [text]="categoryPath" contextLevel="coursecat" [contextInstanceId]="event.category.id"></core-format-text></p>
                 </a>
                 <ion-item text-wrap *ngIf="event.description">
                     <h2>{{ 'core.description' | translate}}</h2>

src/addon/calendar/providers/helper.ts

@@ -144,7 +144,7 @@ export class AddonCalendarHelperProvider {
             courseId = e.course ? e.course.id : e.courseid;
 
         if (categoryId > 0) {
-            e.contextLevel = 'category';
+            e.contextLevel = 'coursecat';
             e.contextInstanceId = categoryId;
         } else if (courseId > 0) {
             e.contextLevel = 'course';

src/core/constants.ts

@@ -18,7 +18,7 @@
 export const enum ContextLevel {
     SYSTEM = 'system',
     USER = 'user',
-    COURSECAT = 'category',
+    COURSECAT = 'coursecat',
     COURSE = 'course',
     MODULE = 'module',
     BLOCK = 'block',