Emit hide/show toolbar signals using a function only.

Rename it to something more obvious as well.

Regs #7874
Make the toolbars get shown back when interface is hidden as well.

Regs #7874
Added a function to change toolbar visibility state to the Python API.

Merged showToolbars and hideToolbars into one for simplicity.

Refs #7874
Made Muon Analysis use new Python API function to show/hide toolbars.

Refs #7874
Apply plot style using Python.

Moved function for Parsing plot style to appropriate tab class and updated it.

Refs #7874
Plot error bars all the time.

Refs #7874
Make setPlotStyle accept wsName and add -1 itself.

A better approach would be to search for all the plots with such object name,
as it gets set in plotSpectrum.

Refs #7874
Moved the code for setting Y axis scale to style function.

Created another one for pre-processing style parameters and setting default
values if something is not specified.

Refs #7874
Build QString instead of stringstream for Python code.

Refs #7874
Removed slots/signal which were replaced by Python code.

These were used by Muon Analysis only.

Refs #7874
New inherits method for the proxy.

Helps to determine if the MDIWindow is of the desired type.

Refs #7874
Refactored setPlotStyle to make resulting Python code simplier.

Plus updated documentation.

Refs #7874
Add function to close plot window.

Removed the signal used to do that previously.

Refs #7874
Created function to hide all plot windows.

Removed signals/slots used to do that previously.

Refs #7874
Added function to show all the plot windows.

Removed signals/slots used to do that before.

Refs #7874
Merge remote-tracking branch 'origin/master' into feature/7874_muon_remove_signals

Conflicts:
	Code/Mantid/MantidPlot/src/ApplicationWindow.cpp
	Code/Mantid/MantidQt/API/inc/MantidQtAPI/UserSubWindow.h
	Code/Mantid/MantidQt/CustomInterfaces/src/MuonAnalysis.cpp

Refs #7874
Expose function to disable all tools fro all graphs to Python.

Refs #7874
Use Python selectMultiPeak function instead of signal.

Search for "emit" shows that the only signal left emmited is
setFitPropertyBrowser.

Refs #7874
Fix a merge error.

Refs #7874
Remove signals/slot used to attach PP tool before.

Refs #7874