Save/Restore Tool Views order

Summary: The patch provides save/restore mechanism for Tool Views panels. Current version produce random order at each start of KDevelop which seems to be "not right" behavior. New version provide save/restore mechanism, which uses Tool Views factory ids to store order - now it independent from current UI language. Also the patch adds new actions to Tool View context menu which provides simple way to change order.

Test Plan:
Tested on master branch.

Reviewers: mwolff, KDevelop, brauch

Reviewed By: KDevelop, brauch

Subscribers: brauch, apol, kdevelop-devel

Differential Revision: https://phabricator.kde.org/D3002