Fix Relative Progress Animations not running in certain cases

Relative Progress Animations rely on the region having information on
the progress, which is set by UpdateProgress.

Thus we need to call UpdateProgress in all cases.

Fixes: #4936

Author: InfusOnWoW

WeakAuras/RegionTypes/Icon.lua

@@ -613,6 +613,7 @@ local function modify(parent, region, data)
     region.UpdateTime = nil
 
     function region:Update()
+      region:UpdateProgress()
       region:UpdateIcon()
     end
   end

WeakAuras/RegionTypes/Texture.lua

@@ -189,6 +189,7 @@ local function modify(parent, region, data)
         DoTexCoord()
       end
     end
+    region:UpdateProgress()
   end
 
   function region:Color(r, g, b, a)