SWE-2 / SP-314 : Static tab browsing implemented, some cleanup on web element waits.

...penbis/uitest/infra/application/GuiApplicationRunner.java

...systemsx/cisd/openbis/uitest/infra/webdriver/Context.java

...stemsx/cisd/openbis/uitest/infra/webdriver/PageProxy.java

...ava/ch/systemsx/cisd/openbis/uitest/page/menu/TabBar.java

...ava/ch/systemsx/cisd/openbis/uitest/page/tab/Browser.java

...va/ch/systemsx/cisd/openbis/uitest/suite/DataSetTest.java

...a/ch/systemsx/cisd/openbis/uitest/suite/SeleniumTest.java

...ch/systemsx/cisd/openbis/uitest/widget/FilterToolBar.java

...rce/java/ch/systemsx/cisd/openbis/uitest/widget/Grid.java

...ch/systemsx/cisd/openbis/uitest/widget/PagingToolBar.java

...rce/java/ch/systemsx/cisd/openbis/uitest/widget/Text.java