newsboat: Change sync and read toggle keys

Changed keys to be a little more coherent with neomutt setup: o/O reload
the current or all feeds (previously r/R);
m/M mark the current feed/all feeds read (previously a/A) if in the feed
list. If in another dialog, m toggles the individual selected article
read.

social/.config/newsboat/config

@@ -74,19 +74,33 @@ bind-key h quit searchresultslist
 bind-key g home
 bind-key G end
 bind-key ^F pagedown
-bind-key ^U pageup
-bind-key ^B halfpageup
+bind-key ^B pageup
 bind-key ^D halfpagedown
+bind-key ^U halfpageup
 bind-key n next-unread
 bind-key N prev-unread
 bind-key ^n next-unread-feed articlelist
 bind-key ^p prev-unread-feed articlelist
 
+unbind-key R
+unbind-key r
+bind-key O reload-all
+bind-key o reload
+
+unbind-key A
+bind-key M mark-all-feeds-read feedlist
+bind-key m mark-feed-read feedlist
+bind-key m toggle-article-read articlelist
+bind-key m toggle-article-read article
+bind-key m toggle-article-read article
+bind-key m toggle-article-read tagselection
+bind-key m toggle-article-read filterselection
+bind-key m toggle-article-read searchresultslist
+
 bind-key s sort
 bind-key S rev-sort
 bind-key U show-urls
 
-bind-key a toggle-article-read
 bind-key f goto-url
 bind-key z toggle-show-read-feeds