Cleanup: remove includes from qthelper.h

To reduce interdependencies, remove the dive.h and divelist.h
includes in qthelper.h

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

desktop-widgets/downloadfromdivecomputer.cpp

@@ -3,6 +3,7 @@
 #include "desktop-widgets/command.h"
 #include "core/display.h"
 #include "core/qthelper.h"
+#include "core/divelist.h"
 #include "core/settings/qPrefDiveComputer.h"
 #include "core/subsurface-string.h"
 #include "core/uemis.h"

desktop-widgets/simplewidgets.cpp

@@ -23,6 +23,7 @@
 #include "desktop-widgets/command.h"
 #include "core/metadata.h"
 #include "core/tag.h"
+#include "core/divelist.h" // for mark_divelist_changed
 
 double MinMaxAvgWidget::average() const
 {

desktop-widgets/tab-widgets/TabDiveInformation.cpp

@@ -8,6 +8,7 @@
 #include "core/qthelper.h"
 #include "core/statistics.h"
 #include "core/display.h"
+#include "core/divelist.h"
 
 #define COMBO_CHANGED 0
 #define TEXT_EDITED 1