feat: change the writable glossary by a right click

[Gen-Rainbow]

Add a new feature. Now users can change the writable glossary by right clicking the editor window. (When the glossary folder has more than one files)

Pull request type

• Feature enhancement -> [enhancement]

Which ticket is resolved?

• 932: To add a function of selecting the glossary upon adding a word

  • https://sourceforge.net/p/omegat/feature-requests/932/

• 1003: Add the ability to select a glossary to add a glossary term to

  • https://sourceforge.net/p/omegat/feature-requests/1003/

What does this PR change?

• src/org/omegat/gui/editor/EditorPopups.java
• src/org/omegat/Bundle.properties
• src/org/omegat/Bundle_zh_CN.properties