editors/featherpad: update to 1.4.0

V1.4.0
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* Check the view cursor before setting it.
* Recognize `text/plain;charset=…` as plain text when pasting (Qt doesn't).
* Highlight comments inside formulas with LaTex.
* Use icons in the recent files menu where possible.
* Prevent tab DND from tab close button.
* Focus side-pane with Ctrl+Escape.
* Safeguard the file type filters of file dialogs from bad translations.
* Added `application/x-zerosize` to the desktop file (after a change in GLib).
* Added an option for showing window title on the menubar.
* Fixed the tab tooltip for special folders.

(pin)