Retention of scroll offset in emoji autocomplete

[apoorvapendse]

While working on #1121 I came across this behavior where:

• You search for an emoji, by typing in a few letters.
• Scroll a bit.
• Delete a few characters and add a few to get different results while maintaing the pattern :.* in your input .
• The new results retain the scrolled length while displaying the results.
• Seems unnatural

CZO topic where this was initially reported

Video demonstration

unusual.scroll.mp4

[AshutoshKhadse23]

Hello,
I would like to work on it

issue.1175.mp4

[AshutoshKhadse23]

The previous PR was having glitch ,the new PR have all necessary changes. Sorry for inconvenience.