chore: update AddFilterButton text

frontend/src/component/feature/FeatureToggleList/FeatureToggleListTable.test.tsx

@@ -96,7 +96,7 @@ test('Filter table by project', async () => {
 
     await screen.findByPlaceholderText(/Search/);
     await screen.getByRole('button', {
-        name: 'Filter',
+        name: 'Add filter',
     });
 
     await Promise.all(
@@ -109,7 +109,7 @@ test('Filter table by project', async () => {
 
     setupNoFeaturesReturned();
 
-    const addFilterButton = screen.getByText('Filter');
+    const addFilterButton = screen.getByText('Add filter');
     addFilterButton.click();
 
     const projectItem = await screen.findByRole('menuitem', {

frontend/src/component/filter/AddFilterButton.tsx

@@ -57,7 +57,7 @@ export const AddFilterButton = ({
     return (
         <div>
             <StyledButton onClick={handleClick} startIcon={<FilterList />}>
-                Filter
+                Add filter
             </StyledButton>
 
             <Menu

frontend/src/component/filter/Filters/Filters.test.tsx

@@ -120,7 +120,7 @@ test('should remove selected item from the add filter list', async () => {
     );
 
     // initial selection list
-    const addFilterButton = await screen.findByText('Filter');
+    const addFilterButton = await screen.findByText('Add filter');
     fireEvent.click(addFilterButton);
     expect((await screen.findByTestId(FILTERS_MENU)).textContent).toBe(
         'StateTags',

frontend/src/component/project/Project/PaginatedProjectFeatureToggles/ProjectFeatureToggles.test.tsx

@@ -174,7 +174,7 @@ test('filters by flag author', async () => {
             route: '/projects/default',
         },
     );
-    const addFilter = await screen.findByText('Filter');
+    const addFilter = await screen.findByText('Add filter');
     fireEvent.click(addFilter);
 
     const createdBy = await screen.findByText('Created by');