[TASK] Set version to 1.2.3.
[BUGFIX] Apply translation arguments only when a translation exists.
[BUGFIX] Fix "undefined array key" in TypoScript condition for page types.
[BUGFIX] Fix "undefined array key" when checking if TypoScript is available in contexts other than Frontend.
[BUGFIX] Load general EarlyAccessConstants also when there is a context specific file.