Weblate should show the old context change for fuzzy strings (gettext)

[alvinhochun]

Is your feature request related to a problem? If so, please describe.

After updating PO files with msgmerge --previous, some translations may be copied from another message with a different context, e.g.:

#: plugins/extensions/metadataeditor/kis_meta_data_editor.cc:95
#, fuzzy, kde-format
#| msgctxt "metadata editor page"
#| msgid "Dublin Core"
msgid "Dublin Core"
msgstr "都柏林核心"

Weblate does not show the difference in context on the UI:

Describe the solution you'd like

Weblate should show the context change in some form.

This is what Lokalize does (not ideal, but it does the job):

Describe alternatives you've considered

None

[nijel]

Duplicate of #1477