Fixes the offset question mark in the alchemy tooltip when the effect is not known

CHANGELOG.md

@@ -129,6 +129,7 @@
     Bug #5106: Still can jump even when encumbered
     Bug #5110: ModRegion with a redundant numerical argument breaks script execution
     Bug #5112: Insufficient magicka for current spell not reflected on HUD icon
+    Bug #5113: Unknown alchemy question mark not centered
     Bug #5123: Script won't run on respawn
     Bug #5124: Arrow remains attached to actor if pulling animation was cancelled
     Bug #5126: Swimming creatures without RunForward animations are motionless during combat

apps/openmw/mwgui/widgets.cpp

@@ -375,7 +375,8 @@ namespace MWGui
             if (!mEffectParams.mKnown)
             {
                 mTextWidget->setCaption ("?");
-                mRequestedWidth = mTextWidget->getTextSize().width + 24;
+                mTextWidget->setCoord(sIconOffset / 2, mTextWidget->getCoord().top, mTextWidget->getCoord().width, mTextWidget->getCoord().height); // Compensates for the missing image when effect is not known
+                mRequestedWidth = mTextWidget->getTextSize().width + sIconOffset;
                 mImageWidget->setImageTexture ("");
                 return;
             }
@@ -466,7 +467,7 @@ namespace MWGui
             }
 
             mTextWidget->setCaptionWithReplacing(spellLine);
-            mRequestedWidth = mTextWidget->getTextSize().width + 24;
+            mRequestedWidth = mTextWidget->getTextSize().width + sIconOffset;
 
             mImageWidget->setImageTexture(MWBase::Environment::get().getWindowManager()->correctIconPath(magicEffect->mIcon));
         }

apps/openmw/mwgui/widgets.hpp

@@ -268,6 +268,7 @@ namespace MWGui
             virtual void initialiseOverride();
 
         private:
+            static const int sIconOffset = 24;
             
             void updateWidgets();