This is a squashed backport of the following commits:
0.4.13-RC-53-g 4f628f6b16 (partial pick of shell32-changes for Miranda CORE-14439 & Winamp CORE-13584, explorer left out)
0.4.14-dev-369-g 141cf04239 (#2046) NTUSER
0.4.15-dev-1126-g 58b0558f94 (#3294) NTUSER
0.4.15-dev-2618-g 32b0cf6fc6 (#3697) NTUSER
0.4.15-dev-2621-g 59d4c11203 (#3700) NTUSER
0.4.15-dev-5242-g e6fb0e0c25 (#4800) Cleanup
brings us closer to releases/0.4.14
In the older branches it will fix the following bugs (or prevents introducing them):
CORE-13584 'Winamp 5.666 erroneously has a secret tab shown in taskbar'
CORE-14380 'Effective File Search 6.8.1 when you open up the app via desktop link there is no pane in taskbar'
CORE-14439 'Miranda IM 0.10.21 snap-to-monitor-border-feature brings ros to halt'
CORE-15655 'Click-N-Type Virtual Keyboard 3.03.0412 has no taskbar pane'
CORE-15669 'DVD Write Now 1.5.12 SP2 setup has no taskbar pane'
CORE-15716 'Photofiltr 7.2.1 has no taskbar pane'
CORE-15731 'Java JRE 6u45 setup, last page of setup has no taskbar pane'
CORE-16030 'Moo0 Audio Recorder - the taskbar icon does not appear'
(CORE-17330 Regression, many installers that should have only 1 taskbar pane, now have 2 of them erroneously)
2e51363fef