Fixed some SonarQube issues.

web/pgadmin/static/js/backform.pgadmin.js

@@ -557,10 +557,9 @@ define([
       this.updateInvalid();
 
       this.$el.find('.btn').on('keyup', (e)=>{
-        switch(e.keyCode) {
-        case 32: /* Spacebar click */
+        /* Spacebar click */
+        if (e.keyCode == 32) {
           $(e.currentTarget).trigger('click');
-          break;
         }
       });
       return this;

web/pgadmin/static/js/browser/server_groups/servers/model_validation.js

@@ -118,7 +118,7 @@ export class ModelValidation {
       } catch(e) {
         try {
           new Address6(ipAddress);
-        } catch(e) {
+        } catch(ex) {
           this.err['hostaddr'] = msg;
           this.errmsg = msg;
         }