Always Tab-focus item list after search bar
Fix compilation with minGW
Fix Ctrl+Shift+Tab to select previous tab
Better solution to focus item list from search bar

TabWidget can be focused if if has Qt::TabFocus focus policy. But that's
quiet annoying -- user needs to press Tab twice to get to tab tree.

This sets item list as next widget in focus chain after search bar.
Preserve order of copied items on copy or pasting multiple items as plain text
fix german translation and remove grouping
correct shortcuts
fix wrong tab shortcuts
Merge pull request #172 from m4r71n/patch-sort

Preserve order of selected items for user commands
Merge pull request #173 from m4r71n/pr-setup

Windows installer: fix german translation and remove grouping
Merge pull request #174 from m4r71n/pr-translation

fix wrong tab shortcuts in German translation
Fix replacing of known labels in commands
Fix altering row colors while filtering items
Append file extension to exported tab files name
Tests: Hide main window before every test

If window is visible and items are added, first item stays is selected
since it was added first -- this is not expected in tests.
Tests: Hide may not work on some window managers

Always show main window (for consistency) and focus first item manually.
Tests: Wait until application is fully started
Check for minimize support only once
Run tests with Travis CI and generate coverage with Coveralls
Coverall: Updated exclude files and compiler/linker flags