Merge pull request #31 from ssbunyk/master

make only one connection to every database
Added version property for mysql server
Added version column in UI
Merge remote-tracking branch 'upstream/master'
Modified unit tests for modeler according to modifications
PEP 8 modifications
Merge pull request #32 from ssirushchyshyn/master

Version property for MySQL server
Merge pull request #33 from ssbunyk/master

reopen connection in case it is stopped
Fix: typo
Fix: ZEN-9035, removed sizes from panels, added sizes chart to MySQL server, added y legends
Fix: ZEN-9037, refined graph labels
Fix: ZEN-9036 in progress
Fix: ZEN-9036 in progress
Fix: ZEN-9052, changed Databases to MySQL Databases
Removed sizes from details panel
Fixed unit tests for dsplugins
Merge pull request #34 from ssirushchyshyn/master

Removed sizes from details panel
In progress: delete DB from UI
Commented out ZEN-9036 fix, still in progress
fixed bug with monitoring after the MySQL server is stopped and then started