Fix #949 #951
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Fix #949 #951
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as this my cause in the "tab modifed" icon handling (see comments in textdoc.cpp)
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Fix #949.
For some reason, closing an unmodified text document may trigger a
signalFileChanged()(via the syntax highlighter) which in turn will runQucsApp::slotFileChanged(), which, if the text document Tab happened to be already removed, will causeDocumentTab->currentIndex()to point to the previous tab andsetSaveIcon(), called byslotFileChanged()will wrongly change that tab icon instead of the (no longer present) text document tab icon.So here I just disconnect
signalFileChanged()before deleting the syntax highlighter of the text document.