Bug 431960

SUMMARY
Setting "Applications to be excluded from sessions" should have a tooltip on its text field explaining the format for the text field.

STEPS TO REPRODUCE
1. Navigate to "System Settings > Startup and Shutdown > Desktop Session"
2. Hover mouse over the text field under label "Applications to be excluded from sessions" in the section "On Login"

OBSERVED RESULT
No tooltip.

EXPECTED RESULT
A tooltip, which explains what kind of format is supposed to be used in the text field for this setting.

SOFTWARE/OS VERSIONS
Operating System: KDE neon 5.20
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.4.0-64-generic
OS Type: 64-bit
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 7.7 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

ADDITIONAL INFORMATION
The help page, available from the Help button has the following:

   Finally, you can enter a colon (:) or comma (,) separated list of
   applications that should be excluded from sessions, and therefore
   will not be started when restoring a session. For example
   xterm:konsole or xterm,konsole.

However, it doesn't explain what exactly to type to include an application in the list. Is it the window title? The name of the application in the Kickoff menu? Is it the name of the binary? If the user isn't savvy enough to guess what's needed from the example, then the user unfortunately has no way of knowing what exactly has to be typed in the text field. Please don't hesitate to include _more_ information in the tooltip.