Abi: Fix Abi constructor to not disallow certain abi combinations

Change-Id: I58e51bb0756270cb7929c0edc0811342a67fbe31
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
Abi: Remove traces of harmhattan and maemo support

Change-Id: Ibacaf76e39e98c9d37d56e0bdedbbae07702e979
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
ProjectExplorer: Fixing style of read-only SysRootInformationConfigWidget

Style of read-only SysRootInformationConfigWidget and QmakeKitConfigWidget
was not matching.

SysRootInformationConfigWidget was using lineEdit.setReadOnly(true)
QmakeKitConfigWidget and even other *InformationConfigWidgets are
using lineEdit.setEnabled(false)

Therefore making SysRootInformationConfigWidget to use setEnabled(false)
too.

Change-Id: I637b7a7afe522b7a622975a1b37b2256a802ae1a
Reviewed-by: Mehdi Fekari <mfekari@blackberry.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>