Fixed some inconvenience on first run mainly in Ubuntu.

- immediately return from initCL() if numpy or pyopencl is unevailable
   (no ImportError because of resetPoW() call)
 - use glob to find C extension even if it named like
   `bitmsghash.x86_64-linux-gnu.so`

If user chooses to show the Settings dialog:

 - activate the "Network Settings" tab
 - remove option 'dontconnect' if settings have been saved

src/bitmessageqt/__init__.py

@@ -1619,7 +1619,8 @@ class MyForm(settingsmixin.SMainWindow):
         self.connectDialogInstance = connectDialog(self)
         if self.connectDialogInstance.exec_():
             if self.connectDialogInstance.ui.radioButtonConnectNow.isChecked():
-                BMConfigParser().remove_option('bitmessagesettings', 'dontconnect')
+                BMConfigParser().remove_option(
+                    'bitmessagesettings', 'dontconnect')
                 BMConfigParser().save()
             else:
                 self.click_actionSettings()
@@ -2349,7 +2350,12 @@ class MyForm(settingsmixin.SMainWindow):
 
     def click_actionSettings(self):
         self.settingsDialogInstance = settingsDialog(self)
+        if self._firstrun:
+            self.settingsDialogInstance.ui.tabWidgetSettings.setCurrentIndex(1)
         if self.settingsDialogInstance.exec_():
+            if self._firstrun:
+                BMConfigParser().remove_option(
+                    'bitmessagesettings', 'dontconnect')
             BMConfigParser().set('bitmessagesettings', 'startonlogon', str(
                 self.settingsDialogInstance.ui.checkBoxStartOnLogon.isChecked()))
             BMConfigParser().set('bitmessagesettings', 'minimizetotray', str(
@@ -4517,7 +4523,9 @@ def run():
     myapp.appIndicatorInit(app)
     myapp.ubuntuMessagingMenuInit()
     myapp.notifierInit()
-    if BMConfigParser().safeGetBoolean('bitmessagesettings', 'dontconnect'):
+    myapp._firstrun = BMConfigParser().safeGetBoolean(
+        'bitmessagesettings', 'dontconnect')
+    if myapp._firstrun:
         myapp.showConnectDialog()  # ask the user if we may connect
 
 #    try:

src/openclpow.py

@@ -26,7 +26,9 @@ except:
     libAvailable = False
 
 def initCL():
-    global ctx, queue, program, hash_dt
+    global ctx, queue, program, hash_dt, libAvailable
+    if libAvailable is False:
+        return
     del enabledGpus[:]
     del vendors[:]
     del gpus[:]
@@ -98,7 +100,6 @@ def do_opencl_pow(hash, target):
 #   logger.debug("Took %d tries.", progress)
     return output[0][0]
 
-if libAvailable:
 initCL()
 
 if __name__ == "__main__":

src/proofofwork.py

@@ -266,9 +266,18 @@ def init():
     else:
         try:
             bso = ctypes.CDLL(os.path.join(paths.codePath(), "bitmsghash", bitmsglib))
-            logger.info("Loaded C PoW DLL %s", bitmsglib)
+        except OSError:
+            import glob
+            try:
+                bso = ctypes.CDLL(glob.glob(os.path.join(
+                    paths.codePath(), "bitmsghash", "bitmsghash*.so"
+                ))[0])
+            except (OSError, IndexError):
+                bso = None
         except:
             bso = None
+        else:
+            logger.info("Loaded C PoW DLL %s", bitmsglib)
     if bso:
         try:
             bmpow = bso.BitmessagePOW