Add zsh support for kdevplatform konsole integration

Summary:
This patch adds zsh support for kdevplatform konsole integration.
An additional small patch for kdevelop is also necessary:
https://phabricator.kde.org/D3172

This diff is based on an very old patch from Philipp A.:
https://git.reviewboard.kde.org/r/110298/diff/4/

Test Plan:
I've tested the patch locally and basic commands work fine under zsh.
Split open also works correctly.

Reviewers: kfunk

Subscribers: kdevelop-devel

Differential Revision: https://phabricator.kde.org/D3171