Revert "Remove price cache clear menu item"

This reverts commit d59111eef5.

gui/builtinContextMenus/priceClear.py

@@ -0,0 +1,30 @@
+from gui.contextMenu import ContextMenu
+import gui.mainFrame
+# noinspection PyPackageRequirements
+import wx
+import gui.globalEvents as GE
+from service.price import Price
+from service.settings import ContextMenuSettings
+
+
+class PriceClear(ContextMenu):
+    def __init__(self):
+        self.mainFrame = gui.mainFrame.MainFrame.getInstance()
+        self.settings = ContextMenuSettings.getInstance()
+
+    def display(self, srcContext, selection):
+        if not self.settings.get('priceClear'):
+            return False
+
+        return srcContext in ("priceViewFull", "priceViewMinimal")
+
+    def getText(self, itmContext, selection):
+        return "Reset Price Cache"
+
+    def activate(self, fullContext, selection, i):
+        sPrc = Price.getInstance()
+        sPrc.clearPriceCache()
+        wx.PostEvent(self.mainFrame, GE.FitChanged(fitID=self.mainFrame.getActiveFit()))
+
+
+PriceClear.register()

gui/contextMenu.py

@@ -208,6 +208,7 @@ from gui.builtinContextMenus import (  # noqa: E402,F401
     changeAffectingSkills,
     tacticalMode,
     targetResists,
+    priceClear,
     priceOptions,
     amount,
     cargoAmmo,