Update the shortcut functions list in documentation

Also alphabetize the shortcut functions declarations in code, to make it
easier to keep the documentation and code in sync.
Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>

config.c

@@ -384,11 +384,11 @@ config_load_default(zathura_t* zathura)
   girara_shortcut_mapping_add(gsession, "adjust_window",     sc_adjust_window);
   girara_shortcut_mapping_add(gsession, "change_mode",       sc_change_mode);
   girara_shortcut_mapping_add(gsession, "display_link",      sc_display_link);
-  girara_shortcut_mapping_add(gsession, "jumplist",          sc_jumplist);
   girara_shortcut_mapping_add(gsession, "follow",            sc_follow);
   girara_shortcut_mapping_add(gsession, "goto",              sc_goto);
-  girara_shortcut_mapping_add(gsession, "navigate_index",    sc_navigate_index);
+  girara_shortcut_mapping_add(gsession, "jumplist",          sc_jumplist);
   girara_shortcut_mapping_add(gsession, "navigate",          sc_navigate);
+  girara_shortcut_mapping_add(gsession, "navigate_index",    sc_navigate_index);
   girara_shortcut_mapping_add(gsession, "print",             sc_print);
   girara_shortcut_mapping_add(gsession, "quit",              sc_quit);
   girara_shortcut_mapping_add(gsession, "recolor",           sc_recolor);

zathurarc.5.rst

@@ -207,17 +207,17 @@ The following shortcut functions can be mapped:
     change_mode       Change current mode
     display_link      Display link target
     follow            Follow a link
-    focus_inputbar    Focus inputbar
     goto              Go to a certain page
-    index_navigate    Navigate through the index
+    jumplist          Move forwards/backwards in the jumplist
     navigate          Navigate to the next/previous page
+    navigate_index    Navigate through the index
+    print             Show the print dialog
     quit              Quit zathura
     recolor           Recolor the pages
     reload            Reload the document
     rotate            Rotate the page
     scroll            Scroll
     search            Search next/previous item
-    set               Set an option
     toggle_fullscreen Toggle fullscreen
     toggle_index      Show or hide index
     toggle_inputbar   Show or hide inputbar