fix(cockpit.ui): minor usability improvements
chore(merge): merge from upstream
chore(distro): use tasklist-tomcat in distro

camunda-tasklist-tomcat is used in distro instead of camunda-tasklist
- aligns the tasklist with other projects (cockpit / cycle)

Related to CAM-973
chore(tasklist): fix development setup

Development setup is fixed
- can be run from tasklist webapp via `mvn clean tomcat:run -Pdevelop`
- includes sample processes

Cleaned up
- use the REST api process engine provider SPI only
  (tasklist specific spi is deleted)

Related to CAM-973
chore(tasklist): add readme
fix(tasklist): fix process variables not being read

Closes CAM-973
chore(cockpit): align develop infrastructure with tasklist

BREAKING CHANGE:

the development profile for cockpit got renamed from dev to develop

Related to CAM-973