Started making changes needed to write the new form builder
Merge branch 'master' into v0.6-new_form_builder
Allow calling init on a widgets pointer multiple times
Fixed inconsistent use of 'title bar' and 'titlebar'
Removed unneeded ReferenceCount struct from SharedWidgetPtr
Fixed mistakes that were made when replacing handleEvent function
When converting colors to a string in getProperty, print the number instead of the character
Hide the open menu of the menu bar when the mouse goes over another widget
In a numeric edit box, you could write multiple + and - symbols after each other
Send a mouse pressed callback right after bringing ChildWindow to front, so that you can always keep a widget before child window.
Replaced atoi and atof by stoi and stof
Removed tgui::to_string as std::to_string can now be used
Merge branch 'master' into v0.6-new_form_builder
Simplify internal storage of callback function
Close the menu in MenuBar when clicking on it
Output an error when the section wasn't found in the config file
Fixed label clipping
Merge changes in private branch into master branch