bindings: make ^Q and M-Q available also in the help viewer

As the help viewer is almost a normal buffer, commands that make sense
-- like searching backwards, and searching the previous occurrence --
should work in the help viewer too.

In addition, show all Search commands prominently in the help lines of
the help viewer, so that users are likely to notice them and will maybe
infer that they work in the editor itself too.

This fixes https://savannah.gnu.org/bugs/?54368.

With-help-from: David Lawrence Ramsey <pooka109@gmail.com>

src/browser.c

@@ -169,12 +169,10 @@ char *do_browser(char *path)
 			do_filesearch();
 		} else if (func == do_research) {
 			do_fileresearch(FORWARD);
-#ifndef NANO_TINY
 		} else if (func == do_findprevious) {
 			do_fileresearch(BACKWARD);
 		} else if (func == do_findnext) {
 			do_fileresearch(FORWARD);
-#endif
 		} else if (func == do_left) {
 			if (selected > 0)
 				selected--;

src/global.c

@@ -758,7 +758,6 @@ void shortcut_init(void)
 	add_to_funcs(do_exit, MHELP, close_tag, "x", 0, VIEW);
 
 	add_to_funcs(do_search_forward, MHELP, whereis_tag, "x", 0, VIEW);
-	add_to_funcs(do_research, MHELP, whereisnext_tag, "x", 0, VIEW);
 #endif
 
 	add_to_funcs(do_cut_text_void, MMAIN,
@@ -842,12 +841,12 @@ void shortcut_init(void)
 		N_("Save"), WITHORSANS(savefile_gist), BLANKAFTER, NOVIEW);
 #endif
 
-	add_to_funcs(do_search_backward, MMAIN,
+	add_to_funcs(do_search_backward, MMAIN|MHELP|MBROWSER,
 		/* TRANSLATORS: This starts a backward search. */
 		N_("Where Was"), WITHORSANS(wherewas_gist), TOGETHER, VIEW);
-	add_to_funcs(do_findprevious, MMAIN,
+	add_to_funcs(do_findprevious, MMAIN|MHELP|MBROWSER,
 		N_("Previous"), WITHORSANS(findprev_gist), TOGETHER, VIEW);
-	add_to_funcs(do_findnext, MMAIN,
+	add_to_funcs(do_findnext, MMAIN|MHELP|MBROWSER,
 		N_("Next"), WITHORSANS(findnext_gist), BLANKAFTER, VIEW);
 
 	add_to_funcs(do_left, MMAIN,
@@ -1099,7 +1098,7 @@ void shortcut_init(void)
 	add_to_sclist(MMAIN, "^R", 0, do_insertfile_void, 0);
 	add_to_sclist(MMAIN, "F5", 0, do_insertfile_void, 0);
 	add_to_sclist(MMAIN, "Ins", 0, do_insertfile_void, 0);
-	add_to_sclist(MMAIN, "^Q", 0, do_search_backward, 0);
+	add_to_sclist(MMAIN|MHELP|MBROWSER, "^Q", 0, do_search_backward, 0);
 	add_to_sclist(MMAIN|MHELP|MBROWSER, "^W", 0, do_search_forward, 0);
 	add_to_sclist(MMAIN|MHELP|MBROWSER, "F6", 0, do_search_forward, 0);
 	add_to_sclist(MMAIN, "^\\", 0, do_replace, 0);
@@ -1140,10 +1139,9 @@ void shortcut_init(void)
 	add_to_sclist(MMAIN|MHELP, "M-/", 0, to_last_line, 0);
 	add_to_sclist(MMAIN|MHELP, "^End", CONTROL_END, to_last_line, 0);
 	add_to_sclist(MMAIN|MHELP, "M-?", 0, to_last_line, 0);
-	add_to_sclist(MMAIN, "M-W", 0, do_findnext, 0);
+	add_to_sclist(MMAIN|MHELP|MBROWSER, "M-W", 0, do_findnext, 0);
-	add_to_sclist(MMAIN, "M-Q", 0, do_findprevious, 0);
+	add_to_sclist(MMAIN|MHELP|MBROWSER, "M-Q", 0, do_findprevious, 0);
-	add_to_sclist(MHELP|MBROWSER, "M-W", 0, do_research, 0);
+	add_to_sclist(MMAIN, "F16", 0, do_research, 0);
-	add_to_sclist(MMAIN|MHELP|MBROWSER, "F16", 0, do_research, 0);
 #ifndef NANO_TINY
 	add_to_sclist(MMAIN, "M-]", 0, do_find_bracket, 0);
 	add_to_sclist(MMAIN, "M-A", 0, do_mark, 0);
@@ -1489,12 +1487,10 @@ sc *strtosc(const char *input)
 		s->func = do_search_backward;
 	else if (!strcasecmp(input, "searchagain"))
 		s->func = do_research;
-#ifndef NANO_TINY
 	else if (!strcasecmp(input, "findprevious"))
 		s->func = do_findprevious;
 	else if (!strcasecmp(input, "findnext"))
 		s->func = do_findnext;
-#endif
 	else if (!strcasecmp(input, "replace"))
 		s->func = do_replace;
 	else if (!strcasecmp(input, "cut"))

src/help.c

@@ -206,11 +206,11 @@ void do_help(void)
 		} else if (func == to_last_line) {
 			to_last_line();
 		} else if (func == do_search_forward) {
-			do_search();
+			do_search_forward();
+			bottombars(MHELP);
+		} else if (func == do_search_backward) {
+			do_search_backward();
 			bottombars(MHELP);
-		} else if (func == do_research) {
-			do_research();
-#ifndef NANO_TINY
 		} else if (func == do_findprevious) {
 			do_findprevious();
 		} else if (func == do_findnext) {
@@ -219,6 +219,7 @@ void do_help(void)
 		} else if (func == (functionptrtype)implant) {
 			implant(first_sc_for(MHELP, func)->expansion);
 #endif
+#ifndef NANO_TINY
 		} else if (kbinput == KEY_WINCH) {
 			; /* Nothing to do. */
 #endif