User Story: Export and Clipboard

• As a user, I want to be able to export the full log with my filters applied for further usage as plain text, because I have to attach it to some bug report
• As a user, I want to copy parts of the displayed log view via clipboard operation to another application.

Tasks:

• It's not really obvious that selecting copies to clipboard, the selection should stay
• add context menu for clipboard copy
• implement menu option for full exports