Dedicated link creation dialog

We don't really need input fields when we are browsing through list of existing links, so better to hide them and invoke dedicated dialog by clicking a button. The dialog should also be interactive: just 1 input for URL and a button like "paste from buffer". When this input is filled, `save` button, as well as `title` and `description` fields must appear. New inputs must already contain filled-in text (similar to what is done by "autofill" button at the moment). "Autofill" button should be removed. The user can alter contents of `title` and `description` inputs before saving.

Start by running the desktop app and locating the existing list view, link input fields, and current “autofill” button. Trace how link creation and clipboard pasting work, then verify that browsing hides the fields, the dedicated dialog reveals them progressively, and title and description remain editable before saving.

Written by the indexing model from the issue text.