Help updates for echolist config section

The "EchoLists" help menu only worked when you first enter the sub-menu and would get wiped out by subsequent child-menu help text.

Filled out the "Configuring an EchoList" help text.

Fixed issue seen where deleting an EchoList's Required Key didn't set the "dirty config" flag, so saving of changes was not prompted when exiting (if that was the only change made).

src/sbbs3/echocfg.c

@@ -2427,13 +2427,13 @@ int main(int argc, char **argv)
 				break;
 
 			case 8:
-	uifc.helpbuf=
-	"~ EchoLists ~\n\n"
-	"This feature allows you to specify lists of echoes, in `BACKBONE.NA`\n"
-	"format, which are utilized in `addition` to your Area File (e.g. \n"
-	"`areas.bbs`) for advanced AreaFix (Area Management) operations.\n";
 				i=0;
 				while(1) {
+					uifc.helpbuf=
+					"~ EchoLists ~\n\n"
+					"This feature allows you to specify lists of echoes, in `BACKBONE.NA`\n"
+					"format, which are utilized in `addition` to your Area File (e.g. \n"
+					"`areas.bbs`) for advanced AreaFix (Area Management) operations.\n";
 					for(u=0;u<cfg.listcfgs;u++)
 						snprintf(opt[u],MAX_OPLN-1,"%s",cfg.listcfg[u].listpath);
 					opt[u][0]=0;
@@ -2493,7 +2493,13 @@ int main(int argc, char **argv)
 					while(1) {
 						j=0;
 						uifc.helpbuf=
-						"Configuring an EchoList"
+						"~ Configuring an EchoList ~\n\n"
+						"The `EchoList Path/Name`, `Required Key` and `Hub Address` must be configured\n"
+						"correctly and any one of the Required Keys added to the `EchoList Keys`\n"
+						"of the `Linked Nodes` of interest.\n"
+						"\n"
+						"The other settings are only for forwarding received Area Manager\n"
+						"requests 'upstream' (to your hub) when needed.\n"
 						;
 						snprintf(opt[j++],MAX_OPLN-1,"%-30.30s %s","EchoList Path/Name"
 							,cfg.listcfg[i].listpath);
@@ -2531,6 +2537,7 @@ int main(int argc, char **argv)
 								"A linked node need only have one of the required keys to have access\n"
 								"the echolist."
 								;
+								x=0;
 								while(1) {
 									for(u=0; cfg.listcfg[i].keys!=NULL && cfg.listcfg[i].keys[u] != NULL;u++)
 										strcpy(opt[u],cfg.listcfg[i].keys[u]);
@@ -2554,6 +2561,7 @@ int main(int argc, char **argv)
 									if((x&MSK_ON)==MSK_DEL) {
 										x&=MSK_OFF;
 										strListRemove(&cfg.listcfg[i].keys,x);
+										uifc.changes = TRUE;
 										continue;
 									}
 									SAFECOPY(str,cfg.listcfg[i].keys[x]);