messagegui: small refactor

Author: thyttan

apps/messagegui/app.js

@@ -373,7 +373,8 @@ function showMessagesScroller(msg, persist, alreadyProcessed) {
       let msgSelect;
       let titleLinesInitials = [titleLines[0]];
       for (let i=1; i<titleLines.length; i++) {
-        if (titleLines[i]-titleLines[i-1] > 1) {titleLinesInitials.push(titleLines[i]);}
+        if (titleLines[i]-titleLines[i-1] === 1) {continue;}
+        titleLinesInitials.push(titleLines[i]);
       }
       for (let i=titleLines.length-1; i>=0 ; i--) {
         if (scrollIdx>=titleLinesInitials[i]) {