Remove /size: parameter conflict with /monitors: for better compatibility

Issue: /monitors:1,2 with /size:3840x1080 still shows only single monitor
Analysis: /size: parameter may conflict with /monitors: in FreeRDP 2.11.5

New approach:
- Use /monitors:1,2 WITHOUT /size: parameter
- Let /monitors: parameter handle monitor layout and sizing automatically
- Remove /size: from command when using specific monitor selection
- Keep /size: only for single monitor or manual resolution settings

Expected behavior:
- /monitors:1,2 should automatically span across monitors 1,2
- Remove potential parameter conflicts causing single monitor fallback
- Maintain fullscreen-like behavior through monitor spanning

Test command change:
Before: xfreerdp /size:3840x1080 /monitors:1,2
After:  xfreerdp /monitors:1,2

This follows FreeRDP documentation that /monitors: should handle sizing.

rdp_client.py

@@ -917,10 +917,16 @@ Multi-Monitor Support:
                 color_depth = conn.get("color_depth", 32)
                 cmd.append(f"/bpp:{color_depth}")
                 
-                # Multiple monitors - use /monitors: for specific selection
+                # Multiple monitors - try different approaches for better compatibility
                 if use_specific_monitors:
+                    # Method 1: Try /monitors: without /size for better compatibility
                     cmd.append(f"/monitors:{monitor_list}")
-                    self.logger.info(f"Using specific monitors for {multimon}: {monitor_list}")
+                    self.logger.info(f"Using specific monitors for {multimon}: {monitor_list} (Method 1: /monitors: only)")
+                    
+                    # Remove the /size: parameter we added earlier - let /monitors: handle sizing
+                    cmd = [x for x in cmd if not x.startswith('/size:')]
+                    self.logger.info("Removed /size: parameter to avoid conflict with /monitors:")
+                    
                 elif multimon == "All Monitors":
                     cmd.append("/multimon")
                     self.logger.info("Using all available monitors")