1004: Update window title on source media rep change - SG-41311 (#1005)

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Fixes #1004

### Summarize your change.
Add listener to "source-media-rep-activated"

### Describe the reason for the change.
Window title doesnt update when changing source media reps

### Describe what you have tested and on which operating system.
tested on linux and windows

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Signed-off-by: Mirco Tornow <[email protected]>

Author: mircotornow

src/plugins/rv-packages/window_title/window_title.mu

@@ -129,6 +129,7 @@ class: WindowTitle : MinorMode
               ("after-progressive-loading", updateAfterDelay, ""),
               ("source-group-complete", updateAfterDelay, ""),
               ("graph-node-inputs-changed", updateAfterDelay, ""),
+              ("source-media-rep-activated", updateAfterDelay, ""),
               ("frame-changed", updateTitle, "")],
              nil);