Prepare 4 10 3
Merge in vstgui from prepare_4_10_3 to master
* commit '7de1d70cfa9f7ead744916ae38e8f07a85b727c7':
fix cairo drawing error when another frame closes
increase version patchlevel
do not store UIViewSwitchContainer children
make sure all control listeners will be notified about control changes in the vst3editor
replace deprecated CTGetCoreTextVersion with @available
fix warning when macOS deployment target is higher than 10.11
fix creating sub UTF8 string if it contains any multi byte character