Disable the client mode refresh if there is a server active for the display
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1. Make the server create an atom with the name XEPDMGR_SERVER_ACTIVE whose contents is the id of a window (whis is not visible but is created by the server)

2. Make the client check for that atom and if it exists (also check when its changed), check if the refered window really exists. If it exists, then the client doesn't do updates as the server is active. It also has to track the destruction of windows so it can revert the option when that window ceases to exist.



Track the creation and moving of the readerim method window and ignore the updates there
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This only applies to when working in client mode.

1. Add Hansel's code to check if the readerim window exists

2. call it on window creation and move.

3. when it exists, ignore the damages on said area.

4. on window destruction if readerim window dissappears, update that area.



Partial updates
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Add the same flag as in displayMgr to disable the use of "partial update ioctl".

