Fix compilation with the latest version of ImGui

- Update Intel macOS GitHub Actions runner to 15

Author: encelo

.github/workflows/macos.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         BuildType: [Debug, Release, BinDist]
-        os: [macOS-13, macOS-15]
+        os: [macOS-15, macOS-15-intel]
 
     runs-on: ${{ matrix.os }}
 
@@ -36,7 +36,7 @@ jobs:
         if [[ "${{ matrix.os }}" == "macOS-15" ]]; then
           export OS=macos15
         else
-          export OS=macos13
+          export OS=macos15-intel
         fi
         export CC=appleclang
         export BRANCH_NAME=$(git describe --tags --exact-match 2> /dev/null || git symbolic-ref -q --short HEAD || git rev-parse --short HEAD)
@@ -112,7 +112,7 @@ jobs:
         if [[ "${{ matrix.os }}" == "macOS-15" ]]; then
           export OS=macos15
         else
-          export OS=macos13
+          export OS=macos15-intel
         fi
         export CC=appleclang
         export PROJECT_EXT=dmg

src/particle_editor_gui.cpp

@@ -1965,5 +1965,6 @@ void MyEventHandler::applyGuiStyleConfig()
 	style.WindowBorderSize = cfg.windowBorder ? 1.0f : 0.0f;
 	style.FrameBorderSize = cfg.frameBorder ? 1.0f : 0.0f;
 	style.PopupBorderSize = cfg.popupBorder ? 1.0f : 0.0f;
-	ImGui::GetIO().FontGlobalScale = cfg.scaling;
+	style.FontScaleMain = cfg.scaling;
+	style.ScaleAllSizes(cfg.scaling);
 }