more karma fixes

app/assets/javascripts/ide/components/commit_sidebar/list.vue

@@ -45,7 +45,8 @@ export default {
     },
     activeFileKey: {
       type: String,
-      required: true,
+      required: false,
+      default: null,
     },
   },
   data() {

app/assets/javascripts/ide/components/commit_sidebar/list_item.vue

@@ -32,7 +32,8 @@ export default {
     },
     activeFileKey: {
       type: String,
-      required: true,
+      required: false,
+      default: null,
     },
   },
   computed: {

app/assets/javascripts/ide/components/repo_commit_section.vue

@@ -32,6 +32,9 @@ export default {
     showStageUnstageArea() {
       return !!(this.someUncommitedChanges || this.lastCommitMsg || !this.unusedSeal);
     },
+    activeFileKey() {
+      return this.activeFile ? this.activeFile.key : null;
+    },
   },
   watch: {
     hasChanges() {
@@ -93,7 +96,7 @@ export default {
         action="stageAllChanges"
         :action-btn-text="__('Stage all')"
         item-action-component="stage-button"
-        :active-file-key="activeFile.key"
+        :active-file-key="activeFileKey"
       />
       <commit-files-list
         icon-name="staged"
@@ -103,7 +106,7 @@ export default {
         :action-btn-text="__('Unstage all')"
         item-action-component="unstage-button"
         :staged-list="true"
-        :active-file-key="activeFile.key"
+        :active-file-key="activeFileKey"
       />
     </template>
     <empty-state