Deleted items still exists in selection set.

for a.tile.openstreetmap.org\b.tile.openstreetmap.org
c.tile.openstreetmap.org
using Y % 3 == 0,1,2 ->a,b,c

a method enableLiteMode is both provided in widgets and axwidget.

2. DIsplay mouse action positions in grid view

Update_xxxx functions in geomarker will remember lat,lon coords, so that user can omit lat,lon props in layer function calls.
This changement enables user to set style props with function "update_point","update_line","update_polygon","update_icon" directly,
it is not nessesery to specify geo locations in paraments list.

Mouse hover event is SLOW! As a result, prop "want_hover" is default setted to "0", means disabled.

We will add additional plugin function to reset this prop in future.

We find a serious BUG, that in multi-layer Qt widget app, signal auto connection approach will fail if two QPushButton (for example) has same object name.
Qt deigner will automaticlly avoid using same object name for two different controls. However, when a widget contains many controls is created as a child widget in mainFrame, auto connection approach will only match first control for one slot.
To slove this problem, all control names should be changed to different style.

We do not use instance ID in layer names, which will cause problems during container UI re-constructing

We do not use instance ID in layer names, which will cause problems during container UI re-constructing

Signed-off-by: goldenhawking <goldenhawking@163.com>

# Conflicts:
#	test_container/testcontainer.h

With the help of this feature, a function call without complete style para will use the default.

2. sloved a tiny problem that selection  box's coord will be mis-calculated during rotating.

We gives every geo_graphics_item an prop, which is a boolean variable. Items can be selected by mouse dragging.