doc: fixes, emphasize changes, explain hold='on', re #8912
new Axes class, xlim, ylim, xscale, yscale, etc. re #8912
re-fix apply linestyles from style strings. re #8912
doc about set_ylabel, etc for Axes objects. re #8912
Merge branch 'master' into feature/8912_CLI_new_branch_to_solve_conflicts

make sure conflicts are no longer there
improve doc, fix minor issues, hide array workspaces. re #8912
Merge branch 'feature/8912_CLI_new_branch_to_solve_conflicts' into develop