fix exception handling
now only one exception dialog is displayed, if many same type exceptions handled (like in #16), and bug reports files always save after exception, not only after pressing "OK" button in exception dialog, closes #17

.project

syntax: regexp
^tests/.*/build$
^.idea/.*
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^.*\.pyc$
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^.*~$
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^.*\.swp$

bug_report.*\.txt
i18n/.*.new$
revision