Indicator components fixes for right-to-left languages (RTL)
Apart from the physical prereq, this branch needs: - u8: https://code.launchpad.net/~lukas-kde/unity8/loadQtCatalog/+merge/309414 (to fix enabling RTL on startup) - uitk: https://code.launchpad.net/~lukas-kde/ubuntu-ui-toolkit/sliderStyleRTL/+merge/309461 (to fix the progress of any slider component)
Approved by: Marco Trevisan (Treviño), Unity8 CI Bot