provide a means to reload individual files

[ngwese]

files are loaded into edit buffers the first time they are selected in the file tree. when files are modified on disk (via ssh for example) there is no way for the user to reload bringing maiden in sync with the device.

one potential UI solution would be to add contextual menus to items in the file tree for less frequently used options such as reload. one downside of the context menu approach is that it is not that phone/tablet friendly.

any solution should take into account that the browser local edit buffer might be "modified", if so a confirmation dialog should be presented to the user informing them that their changes will be lost.