Azure: Consistenly use and place displayName

Author: Flamefire

.azure-pipelines.yml

@@ -123,11 +123,13 @@ stages:
           steps:
             - ${{ if item.container }}:
               # Workaround for missing sudo: https://github.com/microsoft/azure-pipelines-agent/issues/2043
-              - bash: |
+              - displayName: Install sudo in container 
+                bash: |
                   /usr/bin/docker exec -u0 "$AGENT_CONTAINERID" /bin/sh -c \
                      "apt-get update && DEBIAN_FRONTEND=noninteractive apt-get -o Dpkg::Options::='--force-confold' -y install sudo software-properties-common"
                 target: host
-              - bash: |
+              - displayName: Install required SW for containers
+                bash: |
                   set -ex
                   osver=$(lsb_release -sr | cut -f1 -d.)
                   pkgs="g++ git"
@@ -144,14 +146,15 @@ stages:
                   sudo add-apt-repository ppa:git-core/ppa
                   sudo apt-get -o Acquire::Retries=$NET_RETRY_COUNT update
                   sudo apt-get -o Acquire::Retries=$NET_RETRY_COUNT -y -q --no-install-suggests --no-install-recommends install $pkgs
-                displayName: 'Install required sw for containers'
-            - task: Cache@2
+
+            - displayName: Get CCache
+              task: Cache@2
               condition: eq(variables.B2_USE_CCACHE, '1')
               inputs:
                 key: 'ccache|"${{ item.os }}-${{ item.container }}"|"${{ item.compiler }}"'
                 path: $(B2_CCACHE_DIR)
-              displayName: Get CCache
-            - bash: |
+            - displayName: Setup build environment
+              bash: |
                 set -ex
                 if ! command -v "$B2_COMPILER" &> /dev/null && [[ "${{item.os}}" == "ubuntu"* ]]; then
                   sudo apt-get -o Acquire::Retries=$NET_RETRY_COUNT -y -q --no-install-suggests --no-install-recommends install "$B2_COMPILER"
@@ -163,8 +166,8 @@ stages:
                 [[ $(basename "$BUILD_REPOSITORY_NAME") = "boost-ci" ]] || cp -prf boost-ci-cloned/ci .
                 rm -rf boost-ci-cloned
                 source ci/azure-pipelines/install.sh
-              displayName: 'Install'
-            - bash: |
+            - displayName: Build
+              bash: |
                 set -ex
                 echo "SELF=$SELF"
                 echo "BOOST_ROOT=$BOOST_ROOT"
@@ -190,6 +193,6 @@ stages:
               if "%BUILD_REPOSITORY_NAME%" == "%BUILD_REPOSITORY_NAME:boost-ci=%" xcopy /s /e /q /i /y boost-ci-cloned\ci .\ci
               rmdir /s /q boost-ci-cloned
               ci\azure-pipelines\install.bat
-            displayName: 'Install'
+            displayName: Install
           - script: ci\build.bat
-            displayName: 'Build'
+            displayName: Build