Set checkboxes to be on by defualt for list

- I did not remove the functionality to toggle them on/off
  as I think this feature could be useful in the future

ee/app/assets/javascripts/vulnerabilities/components/project_vulnerabilities_app.vue

@@ -108,7 +108,6 @@ export default {
       :dashboard-documentation="dashboardDocumentation"
       :empty-state-svg-path="emptyStateSvgPath"
       :filters="filters"
-      should-show-selection
       :vulnerabilities="vulnerabilities"
       @refetch-vulnerabilities="refetchVulnerabilities"
     >

ee/app/assets/javascripts/vulnerabilities/components/vulnerability_list.vue

@@ -37,7 +37,7 @@ export default {
     shouldShowSelection: {
       type: Boolean,
       required: false,
-      default: false,
+      default: true,
     },
     vulnerabilities: {
       type: Array,

ee/spec/frontend/vulnerabilities/vulnerability_list_spec.js

@@ -73,35 +73,21 @@ describe('Vulnerability list component', () => {
       expect(findSelectionSummary().exists()).toBe(false);
     });
 
-    it('should not show the checkboxes if shouldShowSelection is passed in', () => {
-      expect(findCheckAllCheckboxCell().classes()).toContain('gl-display-none');
-      expect(findFirstCheckboxCell().classes()).toContain('gl-display-none');
-    });
-  });
-
-  describe('when vulnerability selection is enabled', () => {
-    beforeEach(() => {
-      wrapper = createWrapper({
-        props: { vulnerabilities, shouldShowSelection: true },
-      });
-
+    it('should show the selection summary when a checkbox is selected', () => {
       findFirstCheckboxCell()
         .find('input')
         .setChecked(true);
-    });
 
-    it('should show the selection summary when a checkbox is selected', () => {
       return wrapper.vm.$nextTick().then(() => {
         expect(findSelectionSummary().exists()).toBe(true);
       });
     });
 
-    it('should show the checkboxes if shouldShowSelection is passed in', () => {
-      expect(findCheckAllCheckboxCell().classes()).not.toContain('d-none');
-      expect(findFirstCheckboxCell().classes()).not.toContain('d-none');
-    });
-
     it('should sync selected vulnerabilities when the vulnerability list is updated', () => {
+      findFirstCheckboxCell()
+        .find('input')
+        .setChecked(true);
+
       expect(findSelectionSummary().props('selectedVulnerabilities')).toHaveLength(1);
       wrapper.setProps({ vulnerabilities: [] });
       return wrapper.vm.$nextTick().then(() => {
@@ -110,6 +96,23 @@ describe('Vulnerability list component', () => {
     });
   });
 
+  describe('when vulnerability selection is disabled', () => {
+    beforeEach(() => {
+      wrapper = createWrapper({
+        props: { vulnerabilities, shouldShowSelection: false },
+      });
+
+      findFirstCheckboxCell()
+        .find('input')
+        .setChecked(true);
+    });
+
+    it('should not show the checkboxes if shouldShowSelection is passed in', () => {
+      expect(findCheckAllCheckboxCell().classes()).toContain('gl-display-none');
+      expect(findFirstCheckboxCell().classes()).toContain('gl-display-none');
+    });
+  });
+
   describe('when displayed on instance or group level dashboard', () => {
     it('should display the vulnerability locations', () => {
       const newVulnerabilities = generateVulnerabilities();