Core: Remove "Filter" from find toolbar
Core: Remove "Filter" from find toolbar

placeholder text needs to be cleared after calling setFiltering(), which
sets it.

Change-Id: I12c3d56eb620600f6e116b62aed7bb904d94011c
Reviewed-by: Eike Ziller <c142da16c73a95a82d35191bcc55b22835617128@digia.com>

martyone/sailfish-qtcreator,amyvmiwei/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,danimo/qt-creator,darksylinc/qt-creator,farseerri/git_code,omniacreator/qtcreator,danimo/qt-creator,maui-packages/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,omniacreator/qtcreator,xianian/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,xianian/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,farseerri/git_code,darksylinc/qt-creator,Distrotech/qtcreator,martyone/sailfish-qtcreator,farseerri/git_code,darksylinc/qt-creator,martyone/sailfish-qtcreator,xianian/qt-creator,farseerri/git_code,darksylinc/qt-creator,danimo/qt-creator,Distrotech/qtcreator,Distrotech/qtcreator,AltarBeastiful/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,Distrotech/qtcreator,Distrotech/qtcreator,Distrotech/qtcreator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,maui-packages/qt-creator,kuba1/qtcreator,danimo/qt-creator,colede/qtcreator,kuba1/qtcreator,maui-packages/qt-creator,omniacreator/qtcreator,kuba1/qtcreator,colede/qtcreator,amyvmiwei/qt-creator,colede/qtcreator,AltarBeastiful/qt-creator,Distrotech/qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,omniacreator/qtcreator,omniacreator/qtcreator,maui-packages/qt-creator,amyvmiwei/qt-creator,omniacreator/qtcreator,colede/qtcreator,colede/qtcreator,farseerri/git_code,darksylinc/qt-creator,darksylinc/qt-creator,maui-packages/qt-creator,kuba1/qtcreator,farseerri/git_code,xianian/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,colede/qtcreator,danimo/qt-creator,darksylinc/qt-creator,xianian/qt-creator,xianian/qt-creator,xianian/qt-creator,AltarBeastiful/qt-creator,colede/qtcreator,xianian/qt-creator,danimo/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,farseerri/git_code,omniacreator/qtcreator,danimo/qt-creator