Effort/Clean Up Anachronistic Threading Constructs

Type: Effort
State: open

After switching to the new threading-architecture, OOo still uses many thread related constructs, which are not needed anymore.

Problem

Find and remove unnecessary locking and other thread related constructs, e.g.

• unnecessary mutexes,
• unnecessary delegations into the "main" thread,
• the Solar-Mutex,
• clipboard dedicated threads,
• Drag&Drop dedicated threads.

(SolarMutex, vcl::ThreadExecutor)