Save modified phrases when upgrading plugins, packages, etc.
For now when upgrading plugins and packages the phrases that were installed with the extras previously are replaced with the phrases that are stored in install.xml file.
So it doesn't check if phrases were modified and force replacing them with default phrases.
The system should track the status of the phrase and keep default phrases if they were modified. When upgrading any extras it should replace the default phrase and only if it is required it should replace the modified version of the phrase.