Added the ability to replace existing image files

- Updated UI with image form dropdown containing delete and replace
  image actions.
- Adds new endpoint and service/repo handling for replacing existing
  image.
- Includes tests to cover.

lang/en/components.php

@@ -32,6 +32,8 @@ return [
     'image_upload_success' => 'Image uploaded successfully',
     'image_update_success' => 'Image details successfully updated',
     'image_delete_success' => 'Image successfully deleted',
+    'image_replace' => 'Replace Image',
+    'image_replace_success' => 'Image file successfully updated',
 
     // Code Editor
     'code_editor' => 'Edit Code',

lang/en/errors.php

@@ -49,6 +49,7 @@ return [
     // Drawing & Images
     'image_upload_error' => 'An error occurred uploading the image',
     'image_upload_type_error' => 'The image type being uploaded is invalid',
+    'image_upload_replace_type' => 'Image file replacements must be of the same type',
     'drawing_data_not_found' => 'Drawing data could not be loaded. The drawing file might no longer exist or you may not have permission to access it.',
 
     // Attachments