pygui display error and link to emane docs when attempting to use emane node and it is not installed, fix dialog refactoring breaking mobility player, updated emane docs

daemon/core/gui/dialogs/emaneinstall.py

@@ -0,0 +1,25 @@
+import webbrowser
+from tkinter import ttk
+
+from core.gui.dialogs.dialog import Dialog
+from core.gui.themes import PADY
+
+
+class EmaneInstallDialog(Dialog):
+    def __init__(self, app) -> None:
+        super().__init__(app, "EMANE Error")
+        self.draw()
+
+    def draw(self):
+        self.top.columnconfigure(0, weight=1)
+        label = ttk.Label(self.top, text="EMANE needs to be installed!")
+        label.grid(sticky="ew", pady=PADY)
+        button = ttk.Button(
+            self.top, text="EMANE Documentation", command=self.click_doc
+        )
+        button.grid(sticky="ew", pady=PADY)
+        button = ttk.Button(self.top, text="Close", command=self.destroy)
+        button.grid(sticky="ew")
+
+    def click_doc(self):
+        webbrowser.open_new("https://coreemu.github.io/core/emane.html")