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Merge remote-tracking branch 'origin/QA_4_1' into QA_4_1
Few safeguards if cache history not available/expired

Signed-off-by: Atul Pratap Singh <atulpratapsingh05@gmail.com>
Fix bug#4203 on refreshing designer, FullScreen is undefined

Signed-off-by: Atul Pratap Singh <atulpratapsingh05@gmail.com>
Changelog for bug#4202 and #4203

Signed-off-by: Atul Pratap Singh <atulpratapsingh05@gmail.com>
Merge commit 'a70e700'
Merge branch 'QA_4_1'