[CaBundle] Update bundle + fix make_ca_bundle.sh script

make_ca_bundle.sh was actually appending all certs to the file.
As a result, there were duplicated certificates after multiple runs
of the script.
[ShowStatusBar] Fixed settings to show/hide Status Bar

Closes #1259
[Session] Use the same session with both Qt4 & Qt5

The issue with incompatible session were only with first alpha
releases of QtWebKit 2.3