QtVersion settings dialog: Fix a double margin

Change-Id: Ibde66bb459c9cc935ab2c3472c2f30f31d68538f
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
QtVersionManager: Fix memory leak on restoring installer versions

Change-Id: I71fe7284fd3397baf364679dc034c04ef8b84a74
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
QtVersion: Move string constants to QtSupport::Constants

As I need them in two different places

Change-Id: Ic782253916615f43cc43016bbd3d52cfae5ec407
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
QtVersion: Remove old unused code for legacy restore

Change-Id: I8e3872e6da4bab1e7b5d6e7389352e55dea20236
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Fix warning in taskmodel

Change-Id: Ie1c0c7112c2de7af51fb96415155b3b723a488a8
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>