Update the wicd-curses client to work with urwid-1.3.  Based on a patch from:
http://technik.blogbasis.net/wicd-curses-fix-fuer-attributeerror-screen-object-no-attribute-get_input_nonblocking-04-12-2014

--- wicd-1.7.3/curses/wicd-curses.py.orig	2014-12-21 14:40:46.000000000 -0500
+++ wicd-1.7.3/curses/wicd-curses.py	2015-02-05 23:41:17.530901204 -0500
@@ -1153,9 +1153,10 @@
         if not ui._started:
             return False
 
-        input_data = ui.get_input_nonblocking()
+        ui.set_input_timeouts(max_wait=0)
+        input_data = ui.get_input()
         # Resolve any "alarms" in the waiting
-        self.handle_keys(input_data[1])
+        self.handle_keys(input_data)
 
         # Update the screen
         canvas = self.frame.render((self.size), True)
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<tr><td><span title='2021-07-24 16:23:23 +0200'>2021-07-24</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=bc64d9554b337d4baaeccbcce22ea08a184c9e4c'>gnu: Use 'search-input-file' when looking for executables.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-12-24 15:56:57 -0500'>2020-12-24</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=88795880d79993e18e0ea5b2c90a3dcf7488d16b'>gnu: plantuml: Update to 1.2020.24.</a></td><td>Michael Rohleder</td></tr>
<tr><td><span title='2020-10-14 16:31:45 +0200'>2020-10-14</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=2d0bea9c6d98a0dec99218935239dca8b676b86f'>gnu: plantuml: Update to 1.2020.19.</a></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-09-24 09:16:50 +0200'>2020-09-24</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=89ba5f9479a001c89872e42bd1ffdc82bf02b5f7'>gnu: plantuml: Update to 1.2020.17.</a></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-09-18 11:18:09 +0200'>2020-09-18</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=6182897c98e11676b9a370da297a688c311f4cab'>gnu: plantuml: Update to 1.2020.16.</a></td><td>Michael Rohleder</td></tr>
<tr><td><span title='2020-08-01 09:13:40 +0200'>2020-08-01</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=033b43b2684334655e9c778d8a63f4f61561e759'>gnu: plantuml: Update to 1.2020.15.</a></td><td>Michael Rohleder</td></tr>
<tr><td><span title='2020-02-25 13:47:40 +0100'>2020-02-25</span></td><td><a href='/guix/commit/gnu/packages/uml.scm?id=1fc47a9b491bcc6d3a216592f00f71468a2c80f0'>gnu: plantuml: Update to 1.2020.1.</a></td><td>Jelle Licht</td></tr>