Robert Lancaster authored Nov 27, 2018 and Jasem Mutlaq committed Nov 27, 2018

Summary:
Creating the FitsTools Panel on the left side of the FITSViewer to contain the Histogram, the FITSHeader, and the Statistics.
In the future, this will be a good location for parameters for liveStacking and possibly a recent tab too.
Also fixed some bugs in the Histogram and made the histogram more responsive.

Reviewers: mutlaqja

Reviewed By: mutlaqja

Subscribers: yurchor, kde-edu

Tags: #kde_edu

Differential Revision: https://phabricator.kde.org/D17147