Fixed following SonarQube issues:

1. Boolean checks should not be inverted.
2. The comma operator should not be used.
3. Arguments to built-in functions should match documented types.
4. Redundant pairs of parentheses should be removed.
5. A conditionally executed single line should be denoted by indentation, 
6. A while loop should be used instead of a 'for' loop.

web/pgadmin/static/js/codemirror/addon/fold/pgadmin-sqlfoldcode.js

@@ -26,7 +26,7 @@
     let tokenSetNo = 0;
     let startTkn = tokenSet[tokenSetNo].start,
       endTkn = tokenSet[tokenSetNo].end;
-    for (; at > 0;) {
+    while (at > 0) {
       var found = lineText.lastIndexOf(startTkn, at);
       var startToken = startTkn;
       var endToken = endTkn;
@@ -57,7 +57,8 @@
     outer: for (var i = line + 1; i < lastLine; ++i) {
       var text = cm.getLine(i),
         pos = 0;
-      for (;;) {
+      var whileloopvar = 0;
+      while (whileloopvar < 1) {
         var nextOpen = text.indexOf(startToken, pos),
           nextClose = text.indexOf(endToken, pos);
         if (nextOpen < 0) nextOpen = text.length;