Fix eslint no-lonely-if in es5 files

[MAILPOET-1145]

.eslintrc.es5.json

@@ -33,7 +33,6 @@
     "wrap-iife": 0,
     "no-plusplus": 0,
     "default-case": 0,
-    "no-lonely-if": 0,
     "brace-style": 0,
     "space-infix-ops": 0
   }

assets/js/src/date.js

@@ -155,8 +155,7 @@ define('date',
           if (escapeToken === true) {
             convertedFormat.push('[' + token + ']');
             escapeToken = false;
-          } else {
-            if (token === '\\') {
+          } else if (token === '\\') {
             // Slash escapes the next symbol to be treated as literal
             escapeToken = true;
             continue;
@@ -166,7 +165,6 @@ define('date',
             convertedFormat.push('[' + token + ']');
           }
         }
-        }
 
         return convertedFormat.join('');
       }

assets/js/src/form_editor/form_editor.js

@@ -582,12 +582,10 @@ WysijaForm = {
 
     if (window.isRtl) {
       if (WysijaForm.toolbar.left === null) WysijaForm.toolbar.left = 0;
-    } else {
-      if (WysijaForm.toolbar.left === null) {
+    } else if (WysijaForm.toolbar.left === null) {
       WysijaForm.toolbar.left =
           parseInt(window.$(WysijaForm.options.container).positionedOffset().left);
     }
-    }
     if (WysijaForm.toolbar.x === null) {
       WysijaForm.toolbar.x =
         parseInt(

assets/js/src/jquery.serialize_object.js

@@ -80,11 +80,7 @@ define(
               : val;
             cur = cur[key];
           }
-        } else {
-          // Simple key, even simpler rules, since only scalars and shallow
-          // arrays are allowed.
-
-          if ($.isArray(obj[key])) {
+        } else if ($.isArray(obj[key])) {
           // val is already an array, so push on the next value.
           obj[key].push(val);
         } else if (obj[key] !== undefined) {
@@ -95,7 +91,6 @@ define(
           // val is a scalar.
           obj[key] = val;
         }
-        }
       });
 
       return obj;

assets/js/src/modal.js

@@ -559,11 +559,9 @@ define('modal', ['mailpoet', 'jquery'],
               .subpanels[(this.subpanels.length - 1)]
               .onSuccess(this.subpanels[(this.subpanels.length - 1)].data);
           }
-        } else {
-          if (this.options.onSuccess !== null) {
+        } else if (this.options.onSuccess !== null) {
           this.options.onSuccess(this.options.data);
         }
-        }
         this.close();
 
         return this;
@@ -575,11 +573,9 @@ define('modal', ['mailpoet', 'jquery'],
               .subpanels[(this.subpanels.length - 1)]
               .onCancel(this.subpanels[(this.subpanels.length - 1)].data);
           }
-        } else {
-          if (this.options.onCancel !== null) {
+        } else if (this.options.onCancel !== null) {
           this.options.onCancel(this.options.data);
         }
-        }
         this.close();
 
         return this;