fix: Fix setting status of delete button in multiple files widget

codecov.yml

@@ -24,3 +24,5 @@ coverage:
         paths: [ 'package/tests/.*' ]
 comment:
   require_changes: true  # if true: only post the PR comment if coverage changes
+github_checks:
+  annotations: true

package/PartSeg/common_gui/select_multiple_files.py

@@ -228,19 +228,21 @@ def select_directory(self):
             self.paths_input.setText(dial.selectedFiles()[0])
 
     def file_chosen(self):
-        self.delete_button.setEnabled(True)
+        self.delete_button.setEnabled(len(self.selected_files.selectedItems()) != 0)
 
     def delete_element(self):
-        item = self.selected_files.takeItem(self.selected_files.currentRow())
-        self.files_to_proceed.remove(item.file_path)
+        item: FileListItem
+        for item in self.selected_files.selectedItems():
+            self.files_to_proceed.remove(item.file_path)
         self.file_list_changed.emit(self.files_to_proceed)
         if self.selected_files.count() == 0:
-            self.delete_button.setDisabled(True)
+            self.delete_button.setEnabled(False)
 
     def clean(self):
         self.selected_files.clear()
         self.files_to_proceed.clear()
         self.file_list_changed.emit(self.files_to_proceed)
+        self.delete_button.setEnabled(False)
 
     def get_paths(self):
         return sorted(self.files_to_proceed)