Fix: shorten the app-name in "watcher -ds" result

[Waishnav]

Fix: shorten the app-name in "watcher -ds" result

[ujjwall-R]

I created a pull request. Please look into it.
I created a function to truncate the long strings and used it to set the width 22.

[ujjwall-R]

If required we can edit the width to 22-8=14. But I think that is not required. Is it?

[Waishnav]

If required we can edit the width to 22-8=14. But I think that is not required. Is it?

I don't think it is necessary as sometime the appname return with the help of xdotool comes out length more than 20 and I've observed that middle part of that string is imp.

[Waishnav]

@ujjwall-R Thanks for contributing and have a good day ahead.