Improve tooltips

[smbea]

Related to https://github.com/camunda/camunda-modeler/issues/3611

[smbea]

@christian-konrad could you have a look at this? Please review the content and let me know if anything is missing too. You can test them out in the modeler: https://camunda-modeler-on-demand.s3.eu-central-1.amazonaws.com/tooltips/camunda-modeler-tooltips-linux-x64.tar.gz https://camunda-modeler-on-demand.s3.eu-central-1.amazonaws.com/tooltips/camunda-modeler-tooltips-mac.dmg https://camunda-modeler-on-demand.s3.eu-central-1.amazonaws.com/tooltips/camunda-modeler-tooltips-mac.zip https://camunda-modeler-on-demand.s3.eu-central-1.amazonaws.com/tooltips/camunda-modeler-tooltips-win-ia32.zip https://camunda-modeler-on-demand.s3.eu-central-1.amazonaws.com/tooltips/camunda-modeler-tooltips-win-x64.zip

[smbea]

I will pick this up after my FTO since it isn't urgent. Also feel free to take over and merge, if you see fit.

[philippfromme]

@christian-konrad Fixed the merge conflict. Can be merged now.