Added support for a preliminary Preferences Dialog

Dirk asked me to try to make it more modern, so I
used as a base, the Firefox preferences. currently
it saves / loads the preferences, and also smits
a signal 'preferencesChanged' that should be connected
to anything that uses preferenes, via the PreferencesDialog::intance()
object. In the future, I plan to make it have a signal / slot for each
member that changes.

I also moved the icons to a new folder this time, because the
amount of icons is now more than just two, and it was
becoming messy.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>

9 files changed, 74 insertions, 0 deletions

diff --git a/icons/advanced.png b/icons/advanced.png
new file mode 100644
index 000000000..29667661d
--- /dev/null
+++ b/icons/advanced.png
diff --git a/icons/flag.png b/icons/flag.png
new file mode 100644
index 000000000..04b74460a
--- /dev/null
+++ b/icons/flag.png
diff --git a/icons/graph.png b/icons/graph.png
new file mode 100644
index 000000000..674062d81
--- /dev/null
+++ b/icons/graph.png
diff --git a/icons/plus.png b/icons/plus.png
new file mode 100644
index 000000000..1008f31ce
--- /dev/null
+++ b/icons/plus.png
diff --git a/icons/satellite.png b/icons/satellite.png
new file mode 100644
index 000000000..f01953836
--- /dev/null
+++ b/icons/satellite.png
diff --git a/icons/star.svg b/icons/star.svg
new file mode 100644
index 000000000..e4345eb48
--- /dev/null
+++ b/icons/star.svg
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diff --git a/icons/subsurface-icon.png b/icons/subsurface-icon.png
new file mode 100644
index 000000000..00ae35ea2
--- /dev/null
+++ b/icons/subsurface-icon.png
diff --git a/icons/trash.png b/icons/trash.png
new file mode 100644
index 000000000..6025acdfa
--- /dev/null
+++ b/icons/trash.png
diff --git a/icons/units.png b/icons/units.png
new file mode 100644
index 000000000..2636a019d
--- /dev/null
+++ b/icons/units.png