Editable sidebar

[aecreations]

Allow editing of clipping name and content, as well as folder name (except for the Synced Clippings folder) in Clippings Sidebar. Edits should be saved when focus is lost on the textbox, or when clicking another clipping or folder. Consider automatically saving every few seconds, just like Clippings Manager.

Editing shouldn't be allowed for synced clippings and folders if the sync file is read-only.