Added CustomAlertDialogBuilder with ContextThemeWrapper for CustomPaintroidDialog theme and use it for all AlertDialog.Builder occurances
Added CustomAlertDialogBuilder, 2nd commit
Merge branch 'master' into 11.23_ConsistentDialogTheme
Merge pull request #153 from Catrobat/11.23_ConsistentDialogTheme

Added CustomAlertDialogBuilder with ContextThemeWrapper for CustomPaintr...
Implementation: @dladenhauf [DL]
Acceptance: @galstc05 [SG]