I exchanged my computer with co-worker Tom and Sublime Text was not installed on his PC.

So I installed sublime-text by running the below commands

wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add -
echo "deb https://download.sublimetext.com/ apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list
sudo apt-get update
sudo apt-get install sublime-text

Then in FileZila > Edit > Preferences > File Type Association added the below

php /usr/bin/subl
css /usr/bin/subl

Here are some of other posts about Sublime Text

Convert Upper and Lower case letters in Sublime

How to Set Unix as Default Line Ending in Sublime Text