switched on mu4 by default

.github/workflows/ci_linux.yml

@@ -57,7 +57,7 @@ jobs:
     - name: Build
       run: |
         T_ID=${{ secrets.TELEMETRY_TRACK_ID }}; if [ -z "$T_ID" ]; then T_ID="''"; fi
-        sudo bash ./build/ci/linux/build.sh -n ${{ github.run_id }} --telemetry $T_ID
+        sudo bash ./build/ci/linux/build.sh -n ${{ github.run_id }} --telemetry $T_ID --build_mu4 OFF
     - name: Run mtests 
       run: |
         # At moment build and run mtests consume 13.4 Gb of the disk.

.github/workflows/ci_macos.yml

@@ -75,7 +75,7 @@ jobs:
     - name: Build          
       run: |
         T_ID=${{ secrets.TELEMETRY_TRACK_ID }}; if [ -z "$T_ID" ]; then T_ID="''"; fi
-        bash ./build/ci/macos/build.sh -n ${{ github.run_id }} --telemetry $T_ID
+        bash ./build/ci/macos/build.sh -n ${{ github.run_id }} --telemetry $T_ID --build_mu4 OFF
     - name: Package 
       run: |
         S_S="${{ secrets.MAC_SIGN_CERTIFICATE_ENCRYPT_SECRET }}"; if [ -z "$S_S" ]; then S_S="''"; fi

.github/workflows/ci_vtests.yml

@@ -43,7 +43,7 @@ jobs:
       if: contains( env.found, '1')
       run: |
         . ./../musescore_environment.sh
-        make installdebug CPUS=2 PREFIX="$HOME/software" COVERAGE=ON
+        make installdebug CPUS=2 PREFIX="$HOME/software" BUILD_UI_MU4=OFF COVERAGE=ON
     - name: Build reference branch
       if: contains( env.found, '1')
       run: |
@@ -51,7 +51,7 @@ jobs:
         git checkout $BASEREF
         . ./../musescore_environment.sh
         make clean
-        make installdebug CPUS=2 PREFIX="$HOME/softwarebase" COVERAGE=ON 2>/dev/null
+        make installdebug CPUS=2 PREFIX="$HOME/softwarebase" BUILD_UI_MU4=OFF COVERAGE=ON 2>/dev/null
     - name: Run reference vtests
       if: contains( env.found, '1')
       run: |

.github/workflows/ci_windows.yml

@@ -63,7 +63,7 @@ jobs:
       run: |
         IF ${{ secrets.TELEMETRY_TRACK_ID != 0 }} == true ( SET T_ID=${{ secrets.TELEMETRY_TRACK_ID }} ) ELSE ( SET T_ID="''" )
         IF ${{ secrets.CRASH_LOG_SERVER_URL != 0 }} == true ( SET C_URL=${{ secrets.CRASH_LOG_SERVER_URL }} ) ELSE ( SET C_URL="''" )
-        build\ci\windows\build.bat -n ${{ github.run_id }} --telemetry %T_ID% --crashurl %C_URL%
+        build\ci\windows\build.bat -n ${{ github.run_id }} --telemetry %T_ID% --crashurl %C_URL% --build_mu4 OFF
     - name: Package 
       shell: cmd
       run: |

CMakeLists.txt

@@ -59,7 +59,7 @@ if (MSVC)
    set (MINGW false)
 endif (MSVC)
 
-option(BUILD_UI_MU4 "Build Modern UI MuseScore 4" OFF)
+option(BUILD_UI_MU4 "Build Modern UI MuseScore 4" ON)
 
 # We need this early, before FindQt5
 option(BUILD_WEBENGINE "Built in webengine support" ON)

Makefile

@@ -102,8 +102,9 @@ debug:
    	  -DBUILD_PORTAUDIO="${BUILD_PORTAUDIO}"              \
    	  -DBUILD_WEBENGINE="${BUILD_WEBENGINE}"              \
    	  -DUSE_SYSTEM_FREETYPE="${USE_SYSTEM_FREETYPE}"      \
-      -DCOVERAGE="${COVERAGE}"                 \
-   	  -DDOWNLOAD_SOUNDFONT="${DOWNLOAD_SOUNDFONT}"        \
+      -DCOVERAGE="${COVERAGE}"                 			\
+   	  -DDOWNLOAD_SOUNDFONT="${DOWNLOAD_SOUNDFONT}"      \
+	  -DBUILD_UI_MU4="${BUILD_UI_MU4}"         			\
   	  -DCMAKE_SKIP_RPATH="${NO_RPATH}"     ..;            \
       make lrelease;                                        \
       make -j ${CPUS};                                      \