Draft: Feature/skill memory gui

Merge request for @usnlf_albrecht

Todos: SkillExecutions TreeView:

• Add context menu to skill executions (all elements of treeView)
  • Context menu should have button to abort the execution of a skill ("Abort skill") if the skill is executing
  • Context menu should have button to re-execute skill with similar parameters
• Change "isConstructing", "isInitializing", ... to one column with current phase stringified
• Perhaps limit shown skills
  • Memory doesn't limit execution statuses anymore; limit to last hour or so
• Sort skills according to their executor

SkillMemory TreeView:

• implement search function

Other:

• Profiles (needs further clarification/specification)

Optional/Ideas:

• Context menu should have button to delete execution entry (see comment)

source/RobotAPI/gui-plugins/SkillManagerPlugin/SkillManagerMonitorWidget.ui

@@ -77,6 +77,9 @@
       <layout class="QGridLayout" name="gridLayout_4">
        <item row="1" column="0" colspan="3">
         <widget class="QTreeWidget" name="treeWidgetSkillExecutions">
+         <property name="contextMenuPolicy">
+          <enum>Qt::CustomContextMenu</enum>
+         </property>
          <column>
           <property name="text">
            <string>ExecutionID</string>
@@ -94,27 +97,7 @@
          </column>
          <column>
           <property name="text">
-           <string>IsConstructing</string>
-          </property>
-         </column>
-         <column>
-          <property name="text">
-           <string>IsInitializing</string>
-          </property>
-         </column>
-         <column>
-          <property name="text">
-           <string>IsPreparing</string>
-          </property>
-         </column>
-         <column>
-          <property name="text">
-           <string>IsRunning</string>
-          </property>
-         </column>
-         <column>
-          <property name="text">
-           <string>Finished</string>
+           <string>Status</string>
           </property>
          </column>
         </widget>
@@ -171,6 +154,9 @@
         <item row="4" column="0">
          <widget class="QLineEdit" name="lineEditSearch">
           <property name="text">
+           <string/>
+          </property>
+          <property name="placeholderText">
            <string>Search...</string>
           </property>
          </widget>