Fix 152790 : Invalid regex message obscures search

[omkarshinge]

This PR fixes #152790 : Invalid regex message obscures search

Root cause of bug :

• The error message was getting displayed even before the find/search widget takes place after transition/animation which resulted in improper positioning of the error message.

Change done :

• Increased the timeout set for validation from 200ms to 300ms [ file : findWidget.ts ]

Tests performed on UI :

• Checked the reopening of find widget with invalid regex on editor using Ctrl + F key combination [Ctrl+F, invalid regex, Esc, Ctrl+F again as mentioned in bug]
• Checked the find widget on editor using Ctrl + F and Ctrl + V key combination used rapidly with invalid regex

Working behavior after fix :

• The error message gets aligned properly below the find widget.

Test machine details :
Version: 1.69.0
Electron: 18.3.4
Chromium: 100.0.4896.160
Node.js: 16.13.2
V8: 10.0.139.17-electron.0
OS: Linux x64 5.10.0-14-amd64